Tests

feat: `MsgToL1` hash computation #903

Job	Run time
no-std build	3m 8s
Unix tests (ubuntu-latest, stable)	15m 37s
Unix tests (ubuntu-latest, nightly)	5m 1s
WASM tests	6m 42s
Unix tests (macos-11, stable)	5m 50s
Unix tests (macos-11, nightly)	15m 32s
Windows tests (stable, x86_64-pc-windows-gnu)	17m 48s
Windows tests (stable, x86_64-pc-windows-msvc)	17m 48s
Windows tests (nightly, x86_64-pc-windows-gnu)	18m 55s
Windows tests (nightly, x86_64-pc-windows-msvc)	18m 0s
	2h 4m 21s

Provide feedback