v0.3.0

What's new?

• Added type hinting.
• Improved windowing by using window object.
• Improved converters script.
• Improved code and fixed documentation.
• Documentation available at https://superkogito.github.io/spafe/v0.3.0/index.html

New contributors:

• hadware https://github.com/hadware
• Hervé BREDIN https://github.com/hbredin
• Kevin Mattheus Moerman https://github.com/Kevin-Mattheus-Moerman

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