Bumps version into v0.9.0-beta2 #64

Job	Run time
Build and Test (macOS-latest) / Build and Test	1m 14s
Build and Test (windows-latest) / Build and Test	4m 7s
Build and Test (ubuntu-latest) / Build and Test	1m 30s
Push Packages / Push Packages	1m 37s
	8m 28s

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