Bump pyinstaller from 4.2 to 4.3

[dependabot]

Bumps pyinstaller from 4.2 to 4.3.

Release notes

Sourced from pyinstaller's releases.

v4.3

Please see the changelog if you wish to see a full list of changes.

Changelog

Sourced from pyinstaller's changelog.

4.3 (2021-04-16)

Features

* Provide basic implementation for ``FrozenImporter.get_source()`` that
  allows reading source from ``.py`` files that are collected by hooks as
  data files. (:issue:`[#5697](https://github.com/pyinstaller/pyinstaller/issues/5697)`)
* Raise the maximum allowed size of ``CArchive`` (and consequently ``onefile``
  executables) from 2 GiB to 4 GiB. (:issue:`[#3939](https://github.com/pyinstaller/pyinstaller/issues/3939)`)
* The `unbuffered stdio` mode (the ``u`` option) now sets the
  ``Py_UnbufferedStdioFlag``
  flag to enable unbuffered stdio mode in Python library. (:issue:`[#1441](https://github.com/pyinstaller/pyinstaller/issues/1441)`)
* Windows: Set EXE checksums. Reduces false-positive detection from antiviral
  software. (:issue:`[#5579](https://github.com/pyinstaller/pyinstaller/issues/5579)`)
* Add new command-line options that map to collect functions from hookutils:
  ``--collect-submodules``, ``--collect-data``, ``--collect-binaries``,
  ``--collect-all``, and ``--copy-metadata``. (:issue:`[#5391](https://github.com/pyinstaller/pyinstaller/issues/5391)`)
* Add new hook utility :func:`~PyInstaller.utils.hooks.collect_entry_point` for
  collecting plugins defined through setuptools entry points. (:issue:`[#5734](https://github.com/pyinstaller/pyinstaller/issues/5734)`)
Bugfix

* (macOS) Fix ``Bad CPU type in executable`` error in helper-spawned python
  processes when running under ``arm64``-only flavor of Python on Apple M1.
  (:issue:`[#5640](https://github.com/pyinstaller/pyinstaller/issues/5640)`)
* (OSX) Suppress missing library error messages for system libraries as
  those are never collected by PyInstaller and starting with Big Sur,
  they are hidden by the OS. (:issue:`[#5107](https://github.com/pyinstaller/pyinstaller/issues/5107)`)
* (Windows) Change default cache directory to ``LOCALAPPDATA``
  (from the original ``APPDATA``).
  This is to make sure that cached data
  doesn't get synced with the roaming profile.
  For this and future versions ``AppData\Roaming\pyinstaller``
  might be safely deleted. (:issue:`[#5537](https://github.com/pyinstaller/pyinstaller/issues/5537)`)
* (Windows) Fix ``onefile`` builds not having manifest embedded when icon is
  disabled via ``--icon NONE``. (:issue:`[#5625](https://github.com/pyinstaller/pyinstaller/issues/5625)`)
* (Windows) Fix the frozen program crashing immediately with
  ``Failed to execute script pyiboot01_bootstrap`` message when built in
  ``noconsole`` mode and with import logging enabled (either via
  ``--debug imports`` or ``--debug all`` command-line switch). (:issue:`[#4213](https://github.com/pyinstaller/pyinstaller/issues/4213)`)
* ``CArchiveReader`` now performs full back-to-front file search for
  ``MAGIC``, allowing ``pyi-archive_viewer`` to open binaries with extra
  appended data after embedded package (e.g., digital signature).
  (:issue:`[#2372](https://github.com/pyinstaller/pyinstaller/issues/2372)`)
* Fix ``MERGE()`` to properly set references to nested resources with their
  full shared-package-relative path instead of just basename. (:issue:`[#5606](https://github.com/pyinstaller/pyinstaller/issues/5606)`)
</tr></table> 
</code></pre>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/e20e74c03768d432d48665b8ef1e02511b16e4be&quot;&gt;&lt;code&gt;e20e74c&lt;/code&gt;&lt;/a> release 4.3</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/4a08839dfc98dc2f2e1662f608e26e3ab79cdca4&quot;&gt;&lt;code&gt;4a08839&lt;/code&gt;&lt;/a> rebuild man pages</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/8090d562f92e08954950ca82dca1ad03b6bf89ca&quot;&gt;&lt;code&gt;8090d56&lt;/code&gt;&lt;/a> Update readme version (for PyPI page)</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/4529c6597c951a4412530e6d199e635c25ff6328&quot;&gt;&lt;code&gt;4529c65&lt;/code&gt;&lt;/a> Update credits</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/9bc8dd7c4e59139791834e92cf45de8158fb7347&quot;&gt;&lt;code&gt;9bc8dd7&lt;/code&gt;&lt;/a> Prepare for release 4.3</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/aeff9cfe3916c84b8e347f74794931839ce2d9c5&quot;&gt;&lt;code&gt;aeff9cf&lt;/code&gt;&lt;/a> add readthedocs config</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/419f349dad721a253b19d9c596e251818132d6ba&quot;&gt;&lt;code&gt;419f349&lt;/code&gt;&lt;/a> Add hook utility for collecting setuptools entrypoints.</li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/5c2dda98c1103cdcea6b3c157ff419d94139ea26&quot;&gt;&lt;code&gt;5c2dda9&lt;/code&gt;&lt;/a> building: collect built-in extensions into lib-dynload sub-directory (<a href="https://github-redirect.dependabot.com/pyinstaller/pyinstaller/issues/5604&quot;&gt;#5604&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/577e755b7db5e4bd156477e0848fb63e931c253f&quot;&gt;&lt;code&gt;577e755&lt;/code&gt;&lt;/a> Analysis: ctypes: Guard against errors triggered by find_library(). (<a href="https://github-redirect.dependabot.com/pyinstaller/pyinstaller/issues/5734&quot;&gt;#5734&lt;/a&gt;)&lt;/li>

<li><a href="https://github.com/pyinstaller/pyinstaller/commit/745f03c7277cc2214d2e0ca6e2a9bd81b8c906fe&quot;&gt;&lt;code&gt;745f03c&lt;/code&gt;&lt;/a> Bootloader: waf: Support cross-compile for FreeBSD. [skip-ci]</li>

<li>Additional commits viewable in <a href="https://github.com/pyinstaller/pyinstaller/compare/v4.2...v4.3&quot;&gt;compare view</a></li>

</ul>

</details>
<br />



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[chrissimpkins]

@dependabot merge