Jsonschema

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- Update vendored schemas: github-actions, gitlab-ci, readthedocs, renovate,
travis (2023-08-08)
- Remove support for python3.7
- The minimum supported version of the `jsonschema` library is now `4.18.0`,
which introduces new `$ref` resolution behavior and fixes. That behavior is
used in all cases, which should result in faster evaluation especially on
large schemas.
- `$ref` usage may now refer to YAML, TOML, or JSON5 files, or any other
non-JSON format supported by `check-jsonschema`. The file type is inferred
only from the file extension in these cases and defaults to JSON if there is
no recognizable extension.
- Remote schemafiles (http/s) now support YAML, TOML, and JSON5 formats, if the
URL ends with the appropriate extension and the matching parser is available.
Extensionless URLs are treated as JSON.

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- Update vendored schemas: buildkite, dependabot, github-workflows, gitlab-ci,
readthedocs, renovate (2023-07-11)
- Add Bitbucket Pipelines schema and pre-commit hook. Thanks :user:`djgoku`!
(:pr:`282`)

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- Update vendored schemas: github-workflow, gitlab-ci, renovate (2023-06-13)
- Fix the handling of malformed and missing ``Last-Modified`` headers in the
caching downloader. Thanks :user:`balihb`! (:issue:`275`)

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- Update vendored schemas: github-workflows, gitlab-ci, renovate (2023-05-30)
- The schema for enforcing timeout-minutes on GitHub Actions jobs has been
updated to allow for workflow call jobs (which cannot have a timeout)

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- Update vendored schemas: azure-pipelines, buildkite, dependabot,
github-workflows, gitlab-ci, renovate (2023-05-03)
- A new option, ``--disable-formats`` replaces and enhances the
``--disable-format`` flag. ``--disable-formats`` takes a format to disable
and may be passed multiple times, allowing users to opt out of any specific
format checks. ``--disable-formats "*"`` can be used to disable all format
checking. ``--disable-format`` is still supported, but is deprecated and
emits a warning.

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- Update vendored schemas: buildkite, github-workflows, gitlab-ci, renovate,
travis (2023-03-08)
- The ``check-dependabot`` hook now also supports ``.github/dependabot.yaml``
Thanks :user:`noorul`!
- Fix a mistake in the dependency bound for ``jsonschema``, which was intended
to change in v0.21.0