Update av requirement from ~=13.0.0 to ~=13.1.0

[dependabot]

Updates the requirements on av to permit the latest version.

Changelog

Sourced from av's changelog.

v13.1.0

Features:

• Allow passing Python objects around using Frame.opaque and Packet.opaque by :gh-user:CarlosRDomin and :gh-user:WyattBlue in (:pr:1533).
• Allow extradata to be set by encoders by :gh-user:daveisfera in (:pr:1526).
• Add getting ffmpeg version info string by :gh-user:hmaarrfk in (:pr:1564).

Fixes:

• Remove the deprecation module in anticipation of PEP 702 <https://peps.python.org/pep-0702/>_.
• Add type stubs to previously unannotated API sections.
• Improve type stubs for both mypy and mypy --strict.
• Permit only setting time_base with a Fraction, as mypy is unable to respect different types in getters vs setters.
• Declare write_packet function as const by :gh-user:hmaarrfk in (:pr:1517).

v13.0.0

Major:

• Drop FFmpeg 5, Support FFmpeg 7.
• Drop Python 3.8, Support Python 3.13.
• Update FFmpeg to 7.0.2 for the binary wheels.
• Disallow initializing an AudioLayout object with an int.
• Disallow accessing gop_size, timebase as a decoder (Raised deprecation warning before).
• Remove ticks_per_frame property because it was deprecated in FFmpeg.

Features:

• Add AttachmentStream class.
• Add best() method to StreamContainer.
• Add set_audio_frame_size() method to Graph object.
• Add nb_channels property to AudioLayout object.
• Add from_bytes() method to VideoFrame object.

Fixes:

• Fix VideoCC's repl breaking when self._format is None.
• Fix getting pix_fmt property when VideoCC's self._format is None.

v12.3.0

Features:

• Support libav's av_log_set_level by :gh-user:materight in (:pr:1448).
• Add Graph.link_nodes by :gh-user:WyattBlue in (:pr:1449).
• Add default codec properties by :gh-user:WyattBlue in (:pr:1450).

... (truncated)

Commits

• 257f384 Release 13.1.0
• ab8eefa Use proper roles in changelog
• 516e07f Use ffmpeg 7.1 as build default
• 340ed1c Add ffmpeg version info
• e3598c2 Use pytest
• 39fecbd Use ffmpeg 7.1
• 020a0ce Add type stubs for common.py funcs
• f324274 fix missing staticmethod in VideoFrame.from_bytes
• 256f1ba If Conda needs this, they can patch it themselves
• e3253e1 mypy --strict now reports less than 100 errors (#1553)
• Additional commits viewable in compare view

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[dependabot]

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