Update babel to 2.5.3

[pyup-bot]

There's a new version of Babel available.
You are currently using 2.4.0. I have updated it to 2.5.3

These links might come in handy: PyPI | Changelog | Homepage | Docs

Changelog

2.5.2

---

Bugfixes

• Revert the unnecessary PyInstaller fixes from 2.5.0 and 2.5.1 (533) (yagebu)

2.5.1

---

Minor Improvements and bugfixes

• Use a fixed datetime to avoid test failures (520) (narendravardi)
• Parse multi-line future imports better (519) (akx)
• Fix validate_currency docstring (522)
• Allow normalize_locale and exists to handle various unexpected inputs (523) (suhojm)
• Make PyInstaller support more robust (525, 526) (thijstriemstra, akx)

2.5.0

---

New Features

• Numbers: Add currency utilities and helpers (491) (kdeldycke)
• Support PyInstaller (500, 505) (wodo)

Minor Improvements and bugfixes

• Dates: Add str to DateTimePattern (515) (sfermigier)
• Dates: Fix an invalid string to bytes comparison when parsing TZ files on Py3 (498) (rowillia)
• Dates: Formatting zero-padded components of dates is faster (517) (akx)
• Documentation: Fix "Good Commits" link in CONTRIBUTING.md (511) (naryanacharya6)
• Documentation: Fix link to Python gettext module (512) (Linkid)
• Messages: Allow both dash and underscore separated locale identifiers in pofiles (489, 490) (akx)
• Messages: Extract Python messages in nested gettext calls (488) (sublee)
• Messages: Fix in-place editing of dir list while iterating (476, 492) (MarcDufresne)
• Messages: Stabilize sort order (482) (xavfernandez)
• Time zones: Honor the no-inherit marker for metazone names (405) (akx)

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[pyup-bot]

Closing this in favor of #65