Merge ElementsProject/rust-elements#236: chore: fix some minor issues… #561

Job	Run time
Test - stable toolchain	3m 12s
Check WASM	43s
Docs - stable toolchain (recent)	30s
Prepare	6s
Lint - nightly toolchain (recent)	37s
Test - MSRV	8m 15s
Docs - nightly toolchain (recent)	36s
Test - nightly toolchain	2m 48s
	16m 47s

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