[pre-commit.ci] pre-commit autoupdate

Merge pull request #1350 from pallets/update-test-requirements

update requirements, test Python 3.9

update requirements, test Python 3.9

update building docs instructions in contributing guide (#1235)

update contributing guide

Merge pull request #1348 from pallets/json-docs

update tojson docs

update tojson docs

[pre-commit.ci] pre-commit autoupdate (#1347)

Merge pull request #1346 from pallets/dependabot/pip/pytest-6.2.2

Merge pull request #1345 from pallets/dependabot/pip/pre-commit-2.10.0

Bump pytest from 6.2.1 to 6.2.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.1 to 6.2.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.2.1...6.2.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump pre-commit from 2.9.3 to 2.10.0

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.9.3 to 2.10.0.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.9.3...v2.10.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1344 from pallets/dependabot/pip/tox-3.21.3

Bump tox from 3.20.1 to 3.21.3

Bumps [tox](https://github.com/tox-dev/tox) from 3.20.1 to 3.21.3.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.20.1...3.21.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge branch '2.11.x'

release version 2.11.3

Merge pull request #1343 from pallets/urlize-speedup

backport urlize speedup

speed up urlize matching

Merge pull request #1310 from pallets/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

fix new formatting issues

[pre-commit.ci] pre-commit autoupdate

Merge pull request #1195 from bebleo/add_mailto_link_support

Improve and extend urlize

refactor urlize function

don't try other url types if one already matched
no-op function if trim is not enabled
avoid backtracking when matching trailing punctuation
match head and tail punctuation separately
don't scan for unbalanced parentheses more than necessary
ensure email domain starts and ends with a word character

update docs on adding extensions (#1237)

update urlize docs, clean up code

move regexes near implementation
commented verbose regex for http pattern
renamed extra_uri_schemes to extra_schemes

Improve diction (amount -> number) (#1341)

Improve and extend urlize

update docs about required blocks (#1340)

Merge pull request #1243 from MLH-Fellowship/deprecate-extension

 deprecate 'autoescape'  and 'with' extensions for removal in 3.1

deprecate 'with' and 'autoescape' extensions

Merge pull request #1233 from MLH-Fellowship/required-blocks

add required attribute to blocks

add required attribute to blocks

required blocks must be overridden at some point, although not
necessarily by the direct child template

Merge pull request #1339 from mkrizek/issue-1335

native_concat: pass only strings to literal_eval

native_concat: pass only strings to literal_eval

If there is only single node and it is not a string, there is no point
in passing it into ``literal_eval``, just return it immediately.

One of the examples where passing a non-string node into
``literal_eval`` would actually cause problems is when the node is
``Undefined``. On Python 3.10 this would cause ``UndefinedError``
instead of just ``Undefined`` being returned.

Fixes #1335

Fix "If" example in documentation (#1337)

Fix "If" example in documentation

add 'linetable' to the preserved CodeType attributes (#1334)

add 'linetable' to the preserved CodeType attributes

co_linetable replaces co_lnotab as part of PEP 626 in Python 3.10.

Merge pull request #1329 from pallets/dependabot/pip/pytest-6.2.1

Bump pytest from 6.1.2 to 6.2.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.1.2 to 6.2.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.1.2...6.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1330 from pallets/dependabot/pip/pre-commit-2.9.3

Bump pre-commit from 2.9.2 to 2.9.3

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.9.2 to 2.9.3.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.9.2...v2.9.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1328 from pallets/dependabot/pip/pip-tools-5.5.0

Bump pip-tools from 5.4.0 to 5.5.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.4.0...5.5.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Update templates.rst to fix small typo (#1327)

Merge pull request #1322 from pallets/dependabot/pip/pre-commit-2.9.2

Merge pull request #1321 from pallets/dependabot/pip/babel-2.9.0

Bump pre-commit from 2.8.2 to 2.9.2

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.8.2 to 2.9.2.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.8.2...v2.9.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1320 from pallets/dependabot/pip/pip-tools-5.4.0

Bump babel from 2.8.0 to 2.9.0

Bumps [babel](https://github.com/python-babel/babel) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/python-babel/babel/releases)
- [Changelog](https://github.com/python-babel/babel/blob/master/CHANGES)
- [Commits](https://github.com/python-babel/babel/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump pip-tools from 5.3.1 to 5.4.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.3.1...5.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

reduce lock schedule to daily

add lock threads workflow

Merge pull request #1306 from pallets/dependabot/pip/pre-commit-2.8.2

Bump pre-commit from 2.7.1 to 2.8.2

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.7.1 to 2.8.2.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.7.1...v2.8.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1307 from pallets/dependabot/pip/pytest-6.1.2

Bump pytest from 6.1.0 to 6.1.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.1.0 to 6.1.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.1.0...6.1.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1305 from pallets/dependabot/pip/tox-3.20.1

Bump tox from 3.20.0 to 3.20.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.20.0 to 3.20.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.20.0...3.20.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1303 from gibson042/gh-1279-custom-async-filters

Fix custom async filters

detect custom async filters in as_const

Merge pull request #1247 from MLH-Fellowship/type-hints

Setup mypy

Merge pull request #1296 from pallets/dependabot/pip/pytest-6.1.0

Bump pytest from 6.0.2 to 6.1.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.0.2 to 6.1.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.0.2...6.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1292 from pallets/dependabot/pip/pytest-6.0.2

Bump pytest from 6.0.1 to 6.0.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.0.1 to 6.0.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.0.1...6.0.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1291 from pallets/dependabot/pip/tox-3.20.0

Bump tox from 3.19.0 to 3.20.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.19.0 to 3.20.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.19.0...3.20.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Add GitHub templates from Werkzeug (#1282)

Merge pull request #1281 from pallets/dependabot/pip/pre-commit-2.7.1

Bump pre-commit from 2.6.0 to 2.7.1

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.6.0 to 2.7.1.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.6.0...v2.7.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1277 from pallets/dependabot/pip/tox-3.19.0

Bump tox from 3.18.1 to 3.19.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.18.1 to 3.19.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.18.1...3.19.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1274 from pallets/dependabot/pip/pip-tools-5.3.1

Bump pip-tools from 5.3.0 to 5.3.1

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.3.0 to 5.3.1.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.3.0...5.3.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1271 from pallets/dependabot/pip/pytest-6.0.1

Bump pytest from 6.0.0 to 6.0.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.0.0 to 6.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.0.0...6.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1268 from pallets/dependabot/pip/tox-3.18.1

Bump tox from 3.18.0 to 3.18.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.18.0 to 3.18.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.18.0...3.18.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1267 from pallets/dependabot/pip/pytest-6.0.0

Bump pytest from 5.4.3 to 6.0.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 to 6.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.4.3...6.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Setup mypy
* Add missing type hints (these are intended as an initial set of type hints, to be added upon and improved later)
* Setup MyPy to run as a Github Action

Merge pull request #1266 from pallets/dependabot/pip/pip-tools-5.3.0

Bump pip-tools from 5.2.1 to 5.3.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.2.1 to 5.3.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.2.1...5.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1263 from pallets/dependabot/pip/tox-3.18.0

Bump tox from 3.17.1 to 3.18.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.17.1 to 3.18.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.17.1...3.18.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1260 from pallets/dependabot/pip/tox-3.17.1

Bump tox from 3.17.0 to 3.17.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.17.0 to 3.17.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.17.0...3.17.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1259 from pallets/dependabot/pip/tox-3.17.0

Bump tox from 3.16.1 to 3.17.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.16.1 to 3.17.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/3.17.0/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.16.1...3.17.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1254 from pallets/dependabot/pip/pre-commit-2.6.0

Bump pre-commit from 2.5.1 to 2.6.0

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.5.1...v2.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

move metadata to setup.cfg

Merge pull request #1251 from pallets/dependabot/pip/tox-3.16.1

Bump tox from 3.16.0 to 3.16.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.16.0 to 3.16.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.16.0...3.16.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1250 from pallets/dependabot/pip/tox-3.16.0

Bump tox from 3.15.2 to 3.16.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.15.2 to 3.16.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.15.2...3.16.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1240 from MLH-Fellowship/ignore-trim-blocks

Allow +%} to ignore trim_blocks

ignore trim_blocks using '+%}'

Merge pull request #1241 from MLH-Fellowship/macros_with_globals

Fix bug with imported macros and template globals

imported templates can see the current globals

_get_default_module takes an optional context to indicate that the
template is imported. If there are differences between the environment
and rendered template globals, a new module is used for the imported
template.

add more tests for import context behavior