Changelog:
============
-CLDR/Numbers: Add support of local numbering systems for number symbols
-CLDR: Upgrade to CLDR 43
-Frontend: Allow last_translator to be passed as an option to extract_message
-Frontend: Decouple pybabel CLI frontend from distutils/setuptools
-Numbers: Improve parsing of malformed decimals
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>