Bump pyinstaller from 3.4 to 3.6

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 3.4 to 3.6.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES-3.rst)
- [Commits](pyinstaller/pyinstaller@v3.4...v3.6)

---
updated-dependencies:
- dependency-name: pyinstaller
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -63,7 +63,7 @@ pycparser==2.20
 pydocstyle==6.0.0
 pyerfa==1.7.2
 pyflakes==2.3.1
-PyInstaller==3.4
+PyInstaller==3.6
 pylint==2.7.4
 pyparsing==2.4.7
 pyproj==3.0.1