Log Message:
py-babel: updated to 2.9.0

Version 2.9.0

Upcoming version support changes
* This version, Babel 2.9, is the last version of Babel to support Python 2.7, \ 
Python 3.4, and Python 3.5.

Improvements
* CLDR: Use CLDR 37
* Dates: Handle ZoneInfo objects in get_timezone_location, get_timezone_name
* Numbers: Add group_separator feature in number formatting

Bugfixes
* Dates: Correct default Format().timedelta format to 'long' to mute deprecation \ 
warnings
* Import: Simplify iteration code in "import_cldr.py"
* Import: Stop using deprecated ElementTree methods "getchildren()" \ 
and "getiterator()"
* Messages: Fix unicode printing error on Python 2 without TTY.
* Messages: Introduce invariant that _invalid_pofile() takes unicode line.
* Tests: fix tests when using Python 3.9
* Tests: Remove deprecated 'sudo: false' from Travis configuration
* Tests: Support Py.test 6.x
* Utilities: LazyProxy: Handle AttributeError in specified func
* Utilities: Replace usage of parser.suite with ast.parse

Documentation
* Update parse_number comments
* Add __iter__ to Catalog documentation