Bump pyinstaller from 4.2 to 4.3

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 4.2 to 4.3.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES.rst)
- [Commits](pyinstaller/pyinstaller@v4.2...v4.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -10,7 +10,7 @@ fonttools==4.22.0
     # via -r requirements.in
 pyinstaller-hooks-contrib==2021.1
     # via pyinstaller
-pyinstaller==4.2
+pyinstaller==4.3
     # via -r requirements.in
 pyqt5-qt==5.15.2
     # via pyqt5