Bump version to 4.5.4.
Bump version to 4.5.2.
Bump version number to 4.5.1
Bump version number to 4.5.0
Add `long_description_content_type` to setup.py
Bump version number to 4.3.1
Bump version number to 4.3.0
Bump version number and upload .msi generated by Appveyor to Github.
Fix typo in appveyor.yml
Bump version number to 4.1.3