chore(deps): update arrow requirement from ~=0.15.2 to ~=0.15.4

[dependabot-preview]

Updates the requirements on arrow to permit the latest version.

Release notes

Sourced from arrow's releases.

Version 0.15.4

• [FIX] Fixed an issue that caused package installs to fail on Conda Forge.

Changelog

Sourced from arrow's changelog.

0.15.4 (2019-11-02)

• [FIX] Fixed an issue that caused package installs to fail on Conda Forge.

0.15.3 (2019-11-02)

• [NEW] factory.get() can now create arrow objects from a ISO calendar tuple, for example:

>>> arrow.get((2013, 18, 7))
<Arrow [2013-05-05T00:00:00+00:00]>

• [NEW] Added a new token x to allow parsing of integer timestamps with milliseconds and microseconds.
• [NEW] Formatting now supports escaping of characters using the same syntax as parsing, for example:

>>> arw = arrow.now()
>>> fmt = "YYYY-MM-DD h [h] m"
>>> arw.format(fmt)
'2019-11-02 3 h 32'

• [NEW] Added humanize week granularity translations for Chinese, Spanish and Vietnamese.
• [CHANGE] Added ParserError to module exports.
• [FIX] Added support for midnight at end of day. See #703 for details.
• [INTERNAL] Created Travis build for macOS.
• [INTERNAL] Test parsing and formatting against full timezone database.

0.15.2 (2019-09-14)

• [NEW] Added humanize week granularity translations for Portuguese and Brazilian Portuguese.
• [NEW] Embedded changelog within docs and added release dates to versions.
• [FIX] Fixed a bug that caused test failures on Windows only, see #668 for details.

0.15.1 (2019-09-10)

• [NEW] Added humanize week granularity translations for Japanese.
• [FIX] Fixed a bug that caused Arrow to fail when passed a negative timestamp string.
• [FIX] Fixed a bug that caused Arrow to fail when passed a datetime object with tzinfo of type StaticTzInfo.

0.15.0 (2019-09-08)

• [NEW] Added support for DDD and DDDD ordinal date tokens. The following functionality is now possible: arrow.get("1998-045"), arrow.get("1998-45", "YYYY-DDD"), arrow.get("1998-045", "YYYY-DDDD").
• [NEW] ISO 8601 basic format for dates and times is now supported (e.g. YYYYMMDDTHHmmssZ).

... (truncated)

Commits

• a382215 Merge pull request #712 from jadchaar/version-0.15.4
• 101b101 Increment version and add to changelog
• 047f1eb Merge pull request #711 from bollwyvl/Event step 4 details saved to db #710-manifest-in
• 1694d64 revert #679 renaming of MANIFEST[.in] for #710
• 46b9a04 Merge pull request #708 from systemcatch/release-0153
• 279fefe Tweak wording
• 40eb90b Bump version to 0.15.3 and update CHANGELOG
• 065e964 Tweak docs (#707)
• 3b64e90 Formatter supports escape characters (#688)
• 6a5819b Merge pull request #705 from ceorcham/bug-703
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #6577 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #6577   +/-   ##
============================================
  Coverage        65.03%   65.03%           
============================================
  Files              296      296           
  Lines            15248    15248           
============================================
  Hits              9916     9916           
  Misses            5332     5332

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