[tune](deps): Bump pyglet from 1.5.15 to 1.5.21 in /python/requirements/ml

[dependabot]

Bumps pyglet from 1.5.15 to 1.5.21.

Release notes

Sourced from pyglet's releases.

v1.5.21

Features

• A new MovableFrame that allows repositioning Widgets when a specified key modifier is held.
• Text Layouts now have opacity and visible attributes, similar to Sprites.
• Add new shapes.Ellipse class.

Bugfixes

• Xlib - don't enable certain Window options if transparency is not enabled. (#454)
• Windows - Fix issue with some fonts where glyphs overhanging their advance would be cut off.

v1.5.20

Features

• Experimental support for transparent and overlay windows on Linux and Windows.
• Shapes - Allow rotation and changing of border color for the BorderedRectangle.

Bugfixes

• Xlib - Fix the mouse Y position being off by 1-pixel.
• Windows - Fix gapless audio playback on the XAudio2 backend.

v1.5.18

Bugfixes

• If XAudio2 device creation fails, catch exception so that the next driver can be tried.
• Fix dangling file pointers in GStreamer decoder.
• Expose font.name attribute to show the font family name.
• Un-associate queued Source from a deleted Player instance (#256)
• Fix circular import when trying to create a Windows in 'headless' mode.
• Un-associate StreamingSources from deleted Player instances (#256)
• Update pypng lib to avoid deprecated functions (#405)

v1.5.17

Bugfixes

• FFmpeg decoder add FF_INPUT_BUFFER_PADDING_SIZE to buffers.
• Add missing DI8DEVTYPE_SUPPLEMENTAL joystick device type.
• Fix bool clamping causing crash with DirectWrite text decoder.

Maintenance

• Change IncrementalTextLayout to use glScissor instead of glClipPlane.
• Raise warning on Window creation if the GPU drivers do not support OpenGL 2.0

Features

• Add a new shapes.Star shape.

... (truncated)

Changelog

Sourced from pyglet's changelog.

pyglet 1.5.21

Features

• A new MovableFrame that allows repositioning Widgets when a specified key modifier is held.
• Text Layouts now have opacity and visible attributes, similar to Sprites.
• Add new shapes.Ellipse class.

Bugfixes

• Xlib - don't enable certain Window options if transparency is not enabled. (#454)
• Windows - Fix issue with some fonts where glyphs overhanging their advance would be cut off.

pyglet 1.5.20

Features

• Experimental support for transparent and overlay windows on Linux and Windows.
• Shapes - Allow rotation and changing of border color for the BorderedRectangle.

Bugfixes

• Xlib - Fix the mouse Y position being off by 1-pixel.
• Windows - Fix gapless audio playback on the XAudio2 backend.

pyglet 1.5.19

Features

• Add new 'Sector' class to shapes module, for creating sectors of a circle.

Bugfixes

• Ensure that the FFmpegDecoder returns the requested number of bytes.
• When subclassing EventHandlers, ensure that possible TyperErrors give correct feedback.
• Fix missing name attribute on FreeTypeMemoryFace object when adding fonts.

Maintenance

• Re-introduce background threads for refilling Player buffers.
• Allow directly setting Widget values.
• Add docstrings for gui.widgets.
• Refresh of experimental/win32priority.py.

pyglet 1.5.18 Bugfix release

... (truncated)

Commits

• 914bc1f Ready 1.5.21 release.
• d09952c Merge remote-tracking branch 'origin/pyglet-1.5-maintenance' into pyglet-1.5-...
• 467643e Import fix and all rollback.
• a45eb3d Add new MovableFrame that allows repositioning Widgets when a key modifier is...
• 9328a17 Label and Layout enhancements (#461)
• bd3cf7f Start implementing the ability to reposition Widgets.
• 062f7ad Change gl.current_context reference to fix unit tests.
• 05a108b refactoring : add __all__s to __init__s from pyglet.window modules & submodul...
• ded50ed Fix issue with some fonts where glyphs overhanging their advance would be cut...
• 153ff7e Add Ellipse to shapes example.
• Additional commits viewable in compare view

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[dependabot]

Superseded by #443.