Update arrow requirement from <1.0.0,>=0.8.0 to >=0.8.0,<2.0.0

[dependabot]

Updates the requirements on arrow to permit the latest version.

Release notes

Sourced from arrow's releases.

Version 1.0.3

[FIX] Updated internals to avoid issues when running mypy --strict. [FIX] Corrections to Swedish locale. [INTERNAL] Lowered required coverage limit until humanize month tests are fixed.

Changelog

Sourced from arrow's changelog.

1.0.3 (2021-03-05)

• [FIX] Updated internals to avoid issues when running mypy --strict.
• [FIX] Corrections to Swedish locale.
• [INTERNAL] Lowered required coverage limit until humanize month tests are fixed.

1.0.2 (2021-02-28)

• [FIXED] Fixed an OverflowError that could occur when running Arrow on a 32-bit OS.

1.0.1 (2021-02-27)

• [FIXED] A py.typed file is now bundled with the Arrow package to conform to PEP 561.

1.0.0 (2021-02-26)

After 8 years we're pleased to announce Arrow v1.0. Thanks to the entire Python community for helping make Arrow the amazing package it is today!

• [CHANGE] Arrow has dropped support for Python 2.7 and 3.5.
• [CHANGE] There are multiple breaking changes with this release, please see the migration guide <https://github.com/arrow-py/arrow/issues/832>_ for a complete overview.
• [CHANGE] Arrow is now following semantic versioning <https://semver.org/>_.
• [CHANGE] Made humanize granularity="auto" limits more accurate to reduce strange results.
• [NEW] Added support for Python 3.9.
• [NEW] Added a new keyword argument "exact" to span, span_range and interval methods. This makes timespans begin at the start time given and not extend beyond the end time given, for example:

.. code-block:: python

>>> start = Arrow(2021, 2, 5, 12, 30)
>>> end = Arrow(2021, 2, 5, 17, 15)
>>> for r in arrow.Arrow.span_range('hour', start, end, exact=True):
...     print(r)
...
(<Arrow [2021-02-05T12:30:00+00:00]>, <Arrow [2021-02-05T13:29:59.999999+00:00]>)
(<Arrow [2021-02-05T13:30:00+00:00]>, <Arrow [2021-02-05T14:29:59.999999+00:00]>)
(<Arrow [2021-02-05T14:30:00+00:00]>, <Arrow [2021-02-05T15:29:59.999999+00:00]>)
(<Arrow [2021-02-05T15:30:00+00:00]>, <Arrow [2021-02-05T16:29:59.999999+00:00]>)
(<Arrow [2021-02-05T16:30:00+00:00]>, <Arrow [2021-02-05T17:14:59.999999+00:00]>)

• [NEW] Arrow now natively supports PEP 484-style type annotations.
• [FIX] Fixed handling of maximum permitted timestamp on Windows systems.
• [FIX] Corrections to French, German, Japanese and Norwegian locales.
• [INTERNAL] Raise more appropriate errors when string parsing fails to match.

0.17.0 (2020-10-2)

... (truncated)

Commits

• ce69c31 Bump version to 1.0.3 and update CHANGELOG (#940)
• c577c76 Reconfigure arrow/init.py to avoid mypy --strict problems (#938)
• 77b4c5d Lower coverage requirement to 99% until humanize xfail tests are fixed (#937)
• 47c715d Swedish locale fix (#935)
• fc2cbaa Bump version to 1.0.2 and update CHANGELOG (#932)
• 86116ae Fix overflow on 32-bit Linux systems (#931)
• d66cb96 Remove timestamp property references in examples; replace with function where...
• 23800a8 Bump version to 1.0.1 and update CHANGELOG (#927)
• 7bc6784 Add py.typed export per PEP 561 (#925)
• 5248407 Bump version to 1.0.0 and update CHANGELOG (#924)
• Additional commits viewable in compare view

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[dependabot]

Looks like arrow is no longer updatable, so this is no longer needed.