chore: bump version to 0.6.0-rc.2 #253

Job	Run time
Coverage preset=rust-coverage	1m 7s
ubuntu-latest, preset=rust-release	1m 12s
Coverage preset=rust-with-sqlite-coverage	1m 26s
ubuntu-latest, preset=rust-with-sqlite-release	1m 7s
Coverage preset=c99-coverage	39s
ubuntu-latest, preset=c99-release	37s
Coverage preset=c99-with-uhash-coverage	34s
ubuntu-latest, preset=c99-with-uhash-release	32s
windows-latest, preset=rust-release	2m 48s
windows-latest, preset=rust-with-sqlite-release	2m 58s
windows-latest, preset=c99-release	1m 47s
windows-latest, preset=c99-with-uhash-release	2m 59s
macos-latest, preset=rust-release	2m 44s
macos-latest, preset=rust-with-sqlite-release	3m 16s
macos-latest, preset=c99-release	1m 31s
macos-latest, preset=c99-with-uhash-release	1m 21s
Final Results	1s
	26m 39s

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