Migrate from tarpaulin to llvm-cov (#85) #99

Job	Run time
Lint (Format, Clippy)	33s
Sanitizer	4m 19s
Build (WASM)	58s
Build (ubuntu-latest, Rust stable)	2m 36s
Build (ubuntu-latest, Rust beta)	2m 39s
Build (ubuntu-latest, Rust nightly)	2m 48s
Build (windows-latest, Rust stable)	4m 5s
Build (windows-latest, Rust beta)	3m 41s
Build (windows-latest, Rust nightly)	3m 43s
Build (macos-latest, Rust stable)	2m 39s
Build (macos-latest, Rust beta)	3m 40s
Build (macos-latest, Rust nightly)	3m 19s
Coverage	1m 46s
	36m 46s

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