Update babel to 2.7.0

[pyup-bot]

This PR updates Babel from 2.5.3 to 2.7.0.

Changelog

2.7.0

-------------

Possibly incompatible changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

These may be backward incompatible in some cases, as some more-or-less internal
APIs have changed. Please feel free to file issues if you bump into anything
strange and we'll try to help!

* General: Internal uses of ``babel.util.odict`` have been replaced with
``collections.OrderedDict`` from The Python standard library.

Improvements
~~~~~~~~~~~~

* CLDR: Upgrade to CLDR 35.1 - Alberto Mardegan, Aarni Koskela (626, 643)
* General: allow anchoring path patterns to the start of a string - Brian Cappello (600)
* General: Bumped version requirement on pytz - chrisbrake (592)
* Messages: `pybabel compile`: exit with code 1 if errors were encountered - Aarni Koskela (647)
* Messages: Add omit-header to update_catalog - Cédric Krier (633)
* Messages: Catalog update: keep user comments from destination by default - Aarni Koskela (648)
* Messages: Skip empty message when writing mo file - Cédric Krier (564)
* Messages: Small fixes to avoid crashes on badly formatted .po files - Bryn Truscott (597)
* Numbers: `parse_decimal()` `strict` argument and `suggestions` - Charly C (590)
* Numbers: don't repeat suggestions in parse_decimal strict - Serban Constantin (599)
* Numbers: implement currency formatting with long display names - Luke Plant (585)
* Numbers: parse_decimal(): assume spaces are equivalent to non-breaking spaces when not in strict mode - Aarni Koskela (649)
* Performance: Cache locale_identifiers() - Aarni Koskela (644)

Bugfixes
~~~~~~~~

* CLDR: Skip alt=... for week data (minDays, firstDay, weekendStart, weekendEnd) - Aarni Koskela (634)
* Dates: Fix wrong weeknumber for 31.12.2018 - BT-sschmid (621)
* Locale: Avoid KeyError trying to get data on WindowsXP - mondeja (604)
* Locale: get_display_name(): Don't attempt to concatenate variant information to None - Aarni Koskela (645)
* Messages: pofile: Add comparison operators to _NormalizedString - Aarni Koskela (646)
* Messages: pofile: don't crash when message.locations can't be sorted - Aarni Koskela (646)

Tooling & docs
~~~~~~~~~~~~~~

* Docs: Remove all references to deprecated easy_install - Jon Dufresne (610)
* Docs: Switch print statement in docs to print function - NotAFile
* Docs: Update all pypi.python.org URLs to pypi.org - Jon Dufresne (587)
* Docs: Use https URLs throughout project where available - Jon Dufresne (588)
* Support: Add testing and document support for Python 3.7 - Jon Dufresne (611)
* Support: Test on Python 3.8-dev - Aarni Koskela (642)
* Support: Using ABCs from collections instead of collections.abc is deprecated. - Julien Palard (609)
* Tests: Fix conftest.py compatibility with pytest 4.3 - Miro Hrončok (635)
* Tests: Update pytest and pytest-cov - Miro Hrončok (635)

2.6.0

-------------

Possibly incompatible changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

These may be backward incompatible in some cases, as some more-or-less internal APIs have changed.
Please feel free to file issues if you bump into anything strange and we'll try to help!

* Numbers: Refactor decimal handling code and allow bypass of decimal quantization. (kdeldycke) (PR 538)
* Messages: allow processing files that are in locales unknown to Babel (akx) (PR 557)
* General: Drop support for EOL Python 2.6 and 3.3 (hugovk) (PR 546)

Other changes
~~~~~~~~~~~~~

* CLDR: Use CLDR 33 (akx) (PR 581)
* Lists: Add support for various list styles other than the default (akx) (552)
* Messages: Add new PoFileError exception (Bedrock02) (PR 532)
* Times: Simplify Linux distro specific explicit timezone setting search (scop) (PR 528)

Bugfixes
~~~~~~~~

* CLDR: avoid importing alt=narrow currency symbols (akx) (PR 558)
* CLDR: ignore non-Latin numbering systems (akx) (PR 579)
* Docs: Fix improper example for date formatting (PTrottier) (PR 574)
* Tooling: Fix some deprecation warnings (akx) (PR 580)

Tooling & docs
~~~~~~~~~~~~~~

* Add explicit signatures to some date autofunctions (xmo-odoo) (PR 554)
* Include license file in the generated wheel package (jdufresne) (PR 539)
* Python 3.6 invalid escape sequence deprecation fixes (scop) (PR 528)
* Test and document all supported Python versions (jdufresne) (PR 540)
* Update copyright header years and authors file (akx) (PR 559)

Links

• PyPI: https://pypi.org/project/babel
• Changelog: https://pyup.io/changelogs/babel/
• Homepage: http://babel.pocoo.org/
• Docs: https://pythonhosted.org/Babel/