Update stable version in repo from 0.5.0 to 0.5.1

[GermanBluefox]

Think about update stable version to 0.5.1

Version: stable=0.5.0 (95 days old) => latest=0.5.1 (15 days old)
Installs: stable=1031 (69.52%), latest=109 (7.35%), total=1483

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Note: This is an automatically generated message and not personally authored by bluefox!

[raschy]

Thanks