Merge ElementsProject/rust-elements#270: Automated daily update to ru… #691

Job	Run time
Cross test	1m 32s
Docs - nightly toolchain	1m 49s
Test - msrv toolchain (recent)	1m 53s
Test 32-bit version	49s
Bench - nightly toolchain	2m 14s
Lint - nightly toolchain	2m 11s
Docs - stable toolchain	1m 33s
Check WASM	30s
Test - stable toolchain (recent)	6m 55s
Test - nightly toolchain (recent)	6m 12s
	25m 38s

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