Merge ElementsProject/rust-elements#276: Implement calculation of Ass… #757

Job	Run time
Test - nightly toolchain (recent)	5m 36s
Docs - nightly toolchain	1m 20s
Test - stable toolchain (recent)	5m 56s
Test 32-bit version	1m 0s
Cross test	1m 32s
Lint - nightly toolchain	1m 22s
Docs - stable toolchain	1m 14s
Bench - nightly toolchain	1m 37s
Test - msrv toolchain (recent)	1m 20s
Check WASM	44s
	21m 41s

Provide feedback