Prepare for 0.8.0 release #587

Job	Run time
Coverage preset=rust-coverage	1m 37s
ubuntu-latest, preset=rust-release	1m 29s
Coverage preset=rust-with-sqlite-coverage	1m 42s
ubuntu-latest, preset=rust-with-sqlite-release	1m 30s
Coverage preset=c99-coverage	1m 2s
ubuntu-latest, preset=c99-release	28s
Coverage preset=c99-with-uhash-coverage	59s
ubuntu-latest, preset=c99-with-uhash-release	58s
windows-latest, preset=rust-release	4m 3s
windows-latest, preset=rust-with-sqlite-release	3m 56s
windows-latest, preset=c99-release	1m 49s
windows-latest, preset=c99-with-uhash-release	2m 55s
macos-latest, preset=rust-release	1m 17s
macos-latest, preset=rust-with-sqlite-release	1m 26s
macos-latest, preset=c99-release	31s
macos-latest, preset=c99-with-uhash-release	28s
Final Results	1s
	26m 11s

Provide feedback