chore: update dependencies (2019-01-13)

chore: update dependencies (2019-01-13)

Major:

| Package                         | From        | To          |
| :------------------------------ | :---------- | :---------- |
| gulp-clean-css                  | 3.10.0      | 4.0.0       |
| mocha-headless-chrome           | 1.8.3       | 2.0.1       |
| rollup                          | 0.65.2      | 1.1.0       |

Minor:

| Package                         | From        | To          |
| :------------------------------ | :---------- | :---------- |
| @babel/core                     | 7.1.2       | 7.2.2       |
| @babel/preset-env               | 7.1.0       | 7.2.3       |
| @commitlint/cli                 | 7.2.1       | 7.3.1       |
| @commitlint/config-conventional | 7.1.2       | 7.3.1       |
| autoprefixer                    | 9.3.1       | 9.4.5       |
| chai-jquery                     | 2.0.0       | 2.1.0       |
| gulp-prompt                     | 1.1.0       | 1.2.0       |
| husky                           | 1.1.2       | 1.3.1       |
| require-dir                     | 1.1.0       | 1.2.0       |
| rollup-plugin-babel             | 4.0.3       | 4.3.0       |
| sinon                           | 7.0.0       | 7.2.2       |
| webpack                         | 4.23.0      | 4.28.4      |
| webpack-stream                  | 5.1.1       | 5.2.1       |

Patch:

| Package                         | From        | To          |
| :------------------------------ | :---------- | :---------- |
| babel-loader                    | 8.0.4       | 8.0.5       |
| chalk                           | 2.4.1       | 2.4.2       |
| clipboard                       | 2.0.1       | 2.0.4       |
| gulp-plumber                    | 1.2.0       | 1.2.1       |
| inquirer                        | 6.2.0       | 6.2.1       |
| js-yaml                         | 3.12.0      | 3.12.1      |
| rimraf                          | 2.6.2       | 2.6.3       |
| what-input                      | 5.1.2       | 5.1.3       |
| yargs                           | 12.0.2      | 12.0.5      |

Others:

| Package                         | From        | To          |
| :------------------------------ | :---------- | :---------- |
| foundation-docs                 | 96ea89b62   | e00027700   |

No migration is needed.

See:
- https://github.com/rollup/rollup/blob/master/CHANGELOG.md
- https://github.com/scniro/gulp-clean-css/releases
- https://github.com/direct-adv-interfaces/mocha-headless-chrome/issues/24#issuecomment-383884394