Bump pyinstaller from 4.3 to 4.4

[dependabot]

Bumps pyinstaller from 4.3 to 4.4.

Changelog

Sourced from pyinstaller's changelog.

4.4 (2021-07-13)

Features

* (macOS) Implement signing of .app bundle (ad-hoc or with actual signing
  identity, if provided). (:issue:`[#5581](https://github.com/pyinstaller/pyinstaller/issues/5581)`)
* (macOS) Implement support for Apple Silicon M1 (``arm64``) platform
  and different targets for frozen applications (thin-binary ``x86_64``,
  thin-binary ``arm64``, and fat-binary ``universal2``), with build-time
  arch validation and ad-hoc resigning of all collected binaries.
  (:issue:`[#5581](https://github.com/pyinstaller/pyinstaller/issues/5581)`)
* (macOS) In ``onedir`` ``windowed`` (.app bundle) mode, perform an
  interation of Apple event processing to convert ``odoc`` and ``GURL``
  events to ``sys.argv`` before entering frozen python script. (:issue:`[#5920](https://github.com/pyinstaller/pyinstaller/issues/5920)`)
* (macOS) In windowed (.app bundle) mode, always log unhandled exception
  information to ``syslog``, regardless of debug mode. (:issue:`[#5890](https://github.com/pyinstaller/pyinstaller/issues/5890)`)
* (Windows) Add support for Python from Microsoft App Store. (:issue:`[#5816](https://github.com/pyinstaller/pyinstaller/issues/5816)`)
* (Windows) Implement a custom dialog for displaying information about
  unhandled
  exception and its traceback when running in windowed/noconsole mode.
  (:issue:`[#5890](https://github.com/pyinstaller/pyinstaller/issues/5890)`)
* Add **recursive** option to :func:`PyInstaller.utils.hooks.copy_metadata()`.
  (:issue:`[#5830](https://github.com/pyinstaller/pyinstaller/issues/5830)`)
* Add ``--codesign-identity``  command-line switch to perform code-signing
  with actual signing identity instead of ad-hoc signing (macOS only).
  (:issue:`[#5581](https://github.com/pyinstaller/pyinstaller/issues/5581)`)
* Add ``--osx-entitlements-file`` command-line switch that specifies optional
  entitlements file to be used during code signing of collected binaries
  (macOS only). (:issue:`[#5581](https://github.com/pyinstaller/pyinstaller/issues/5581)`)
* Add ``--target-arch`` command-line switch to select target architecture
  for frozen application (macOS only). (:issue:`[#5581](https://github.com/pyinstaller/pyinstaller/issues/5581)`)
* Add a splash screen that displays a background image and text:
  The splash screen can be controlled from within Python using the
  ``pyi_splash`` module.
  A splash screen can be added using the ``--splash IMAGE_FILE`` option.
  If optional text is enabled, the splash screen will show the progress of
  unpacking in
  onefile mode.
  This feature is supported only on Windows and Linux.
  A huge thanks to `@Chrisg2000 <https://github.com/Chrisg2000>`_ for
  programming this feature. (:issue:`[#4354](https://github.com/pyinstaller/pyinstaller/issues/4354)`, :issue:`[#4887](https://github.com/pyinstaller/pyinstaller/issues/4887)`)
* Add hooks for ``PyQt6``. (:issue:`[#5865](https://github.com/pyinstaller/pyinstaller/issues/5865)`)
* Add hooks for ``PySide6``. (:issue:`[#5865](https://github.com/pyinstaller/pyinstaller/issues/5865)`)
* Add option to opt-out from reporting full traceback for unhandled exceptions
  in windowed mode (Windows and macOS only), via
  ``--disable-windowed-traceback``
  PyInstaller CLI switch and the corresponding ``disable_windowed_traceback``
  boolean argument to ``EXE()`` in spec file. (:issue:`[#5890](https://github.com/pyinstaller/pyinstaller/issues/5890)`)
</tr></table> 

... (truncated)

Commits

• 90431c0 Release v4.4
• 3aed039 Correctly set doc link version for release
• aa9aac7 rebuild bootloaders
• f5e0c80 doc: update credits
• 7276b41 doc: rebuild man pages
• 2b0739c Prepare for release of 4.4
• f9fd2e6 docs: clarify where --paths option updates in spec file (#5962)
• eb470f0 Tests: Requirements: Scheduled weekly dependency update for week 28 (#5997)
• 018fa3f Bootloader: Add Dockerfile to cross compile Linux bootloaders for abnormal ar...
• 9d57730 Add support for pkgutil.iter_modules (#5959)
• Additional commits viewable in compare view

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