3.0.0-rc.2

This is the second and final (maybe) release candidate for CSFML 3, which adds two missing API changes and updates the NuGet package creation process to allow updating SFML.Net, while making preparations for the official CSFML 3 release.

• Add missing setMinimumSize and setMaximumSize window methods by @eXpl0it3r in #399
• Implement resize for Texture by @dogunbound in #402
• Add tests for sfImage by @ChrisThrasher in #403
• Various improvements to the CI pipelines and NuGet packaging

Full Changelog: 3.0.0-rc.1...3.0.0-rc.2