Update importlib-metadata to 3.4.0

[pyup-bot]

This PR updates importlib-metadata from 1.3.0 to 3.4.0.

Changelog

3.4.0

======

* 10: Project now declares itself as being typed.
* 272: Additional performance enhancements to distribution
discovery.
* 111: For PyPA projects, add test ensuring that
``MetadataPathFinder._search_paths`` honors the needed
interface. Method is still private.

3.3.0

======

* 265: ``EntryPoint`` objects now expose a ``.dist`` object
referencing the ``Distribution`` when constructed from a
Distribution.

3.2.0

======

* The object returned by ``metadata()`` now has a
formally-defined protocol called ``PackageMetadata``
with declared support for the ``.get_all()`` method.
Fixes 126.

3.1.1

======

3.1.0

======

* Merge with 2.1.0.

3.0.0

======

* Require Python 3.6 or later.

2.1.1

======

* 261: Restored compatibility for package discovery for
metadata without version in the name and for legacy
eggs.

2.1.0

======

* 253: When querying for package metadata, the lookup
now honors
`package normalization rules <https://packaging.python.org/specifications/recording-installed-packages/>`_.

2.0.0

======

* ``importlib_metadata`` no longer presents a
``__version__`` attribute. Consumers wishing to
resolve the version of the package should query it
directly with
``importlib_metadata.version('importlib-metadata')``.
Closes 71.

1.7.0

======

* ``PathNotFoundError`` now has a custom ``__str__``
mentioning "package metadata" being missing to help
guide users to the cause when the package is installed
but no metadata is present. Closes 124.

1.6.1

======

* Added ``Distribution._local()`` as a provisional
demonstration of how to load metadata for a local
package. Implicitly requires that
`pep517 <https://pypi.org/project/pep517>`_ is
installed. Ref 42.
* Ensure inputs to FastPath are Unicode. Closes 121.
* Tests now rely on ``importlib.resources.files`` (and
backport) instead of the older ``path`` function.
* Support any iterable from ``find_distributions``.
Closes 122.

1.6.0

======

* Added ``module`` and ``attr`` attributes to ``EntryPoint``

1.5.2

======

* Fix redundant entries from ``FastPath.zip_children``.
Closes 117.

1.5.1

======

* Improve reliability and consistency of compatibility
imports for contextlib and pathlib when running tests.
Closes 116.

1.5.0

======

* Additional performance optimizations in FastPath now
saves an additional 20% on a typical call.
* Correct for issue where PyOxidizer finder has no
``__module__`` attribute. Closes 110.

1.4.0

======

* Through careful optimization, ``distribution()`` is
3-4x faster. Thanks to Antony Lee for the
contribution. Closes 95.

* When searching through ``sys.path``, if any error
occurs attempting to list a path entry, that entry
is skipped, making the system much more lenient
to errors. Closes 94.

Links

• PyPI: https://pypi.org/project/importlib-metadata
• Changelog: https://pyup.io/changelogs/importlib-metadata/
• Repo: https://github.com/python/importlib_metadata

[pyup-bot]

Closing this in favor of #306