Bump python-dateutil from 1.5 to 2.8.1

[dependabot]

Bumps python-dateutil from 1.5 to 2.8.1.

Release notes

Sourced from python-dateutil's releases.

2.8.1

Version 2.8.1 (2019-11-03)

Data updates

• Updated tzdata version to 2019c.

Bugfixes

• Fixed a race condition in the tzoffset and tzstr "strong" caches on Python 2.7. Reported by @​kainjow (gh issue #901).
• Parsing errors will now raise ParserError, a subclass of ValueError, which has a nicer string representation. Patch by @​gfyoung (gh pr #881).
• parser.parse will now raise TypeError when tzinfos is passed a type that cannot be interpreted as a time zone. Prior to this change, it would raise an UnboundLocalError instead. Patch by @​jbrockmendel (gh pr #891).
• Changed error message raised when when passing a bytes object as the time zone name to gettz in Python 3. Reported and fixed by @​labrys () (gh issue #927, gh pr #935).
• Changed compatibility logic to support a potential Python 4.0 release. Patch by Hugo van Kemenade (gh pr #950).
• Updated many modules to use tz.UTC in favor of tz.tzutc() internally, to avoid an unnecessary function call. (gh pr #910).
• Fixed issue where dateutil.tz was using a backported version of contextlib.nullcontext even in Python 3.7 due to a malformed import statement. (gh pr #963).

Tests

• Switched from using assertWarns to using pytest.warns in the test suite. (gh pr #969).
• Fix typo in setup.cfg causing PendingDeprecationWarning to not be explicitly specified as an error in the warnings filter. (gh pr #966)
• Fixed issue where test_tzlocal_offset_equal would fail in certain environments (such as FreeBSD) due to an invalid assumption about what time zone names are provided. Reported and fixed by Kubilay Kocak (gh issue #918, pr #928).
• Fixed a minor bug in test_isoparser related to bytes/str handling. Fixed by @​fhuang5 (gh issue #776, gh pr #879).
• Explicitly listed all markers used in the pytest configuration. (gh pr #915)
• Extensive improvements to the parser test suite, including the adoption of pytest-style tests and the addition of parametrization

... (truncated)

Changelog

Sourced from python-dateutil's changelog.

Version 2.8.1 (2019-11-03)

Data updates

• Updated tzdata version to 2019c.

Bugfixes

• Fixed a race condition in the tzoffset and tzstr "strong" caches on Python 2.7. Reported by @​kainjow (gh issue #901).
• Parsing errors will now raise ParserError, a subclass of ValueError, which has a nicer string representation. Patch by @​gfyoung (gh pr #881).
• parser.parse will now raise TypeError when tzinfos is passed a type that cannot be interpreted as a time zone. Prior to this change, it would raise an UnboundLocalError instead. Patch by @​jbrockmendel (gh pr #891).
• Changed error message raised when when passing a bytes object as the time zone name to gettz in Python 3. Reported and fixed by @​labrys () (gh issue #927, gh pr #935).
• Changed compatibility logic to support a potential Python 4.0 release. Patch by Hugo van Kemenade (gh pr #950).
• Updated many modules to use tz.UTC in favor of tz.tzutc() internally, to avoid an unnecessary function call. (gh pr #910).
• Fixed issue where dateutil.tz was using a backported version of contextlib.nullcontext even in Python 3.7 due to a malformed import statement. (gh pr #963).

Tests

• Switched from using assertWarns to using pytest.warns in the test suite. (gh pr #969).
• Fix typo in setup.cfg causing PendingDeprecationWarning to not be explicitly specified as an error in the warnings filter. (gh pr #966)
• Fixed issue where test_tzlocal_offset_equal would fail in certain environments (such as FreeBSD) due to an invalid assumption about what time zone names are provided. Reported and fixed by Kubilay Kocak (gh issue #918, pr #928).
• Fixed a minor bug in test_isoparser related to bytes/str handling. Fixed by @​fhuang5 (gh issue #776, gh pr #879).
• Explicitly listed all markers used in the pytest configuration. (gh pr #915)
• Extensive improvements to the parser test suite, including the adoption of pytest-style tests and the addition of parametrization of several test cases. Patches by @​jbrockmendel (gh prs #735, #890, #892, #894).
• Added tests for tzinfos input types. Patch by @​jbrockmendel (gh pr #891).

... (truncated)

Commits

• See full diff in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot]

Looks like python-dateutil is up-to-date now, so this is no longer needed.