Merge ElementsProject/rust-elements#269: bump MSRV to 1.74.0 #675

Job	Run time
Docs - nightly toolchain	1m 46s
Docs - stable toolchain	1m 46s
Cross test	1m 45s
Test 32-bit version	38s
Test - stable toolchain (recent)	14m 23s
Lint - nightly toolchain	1m 49s
Check WASM	33s
Bench - nightly toolchain	2m 36s
Test - nightly toolchain (recent)	5m 49s
Test - msrv toolchain (recent)	1m 51s
	32m 56s

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