Use vectors instead of slices for PI #1172

Job	Run time
Bitrot check	1m 11s
Run the examples	1m 13s
Build target wasm32-unknown-unknown	1m 20s
Intra-doc links	48s
Build target wasm32-wasi	1m 24s
Rustfmt	17s
Test on ubuntu-latest with basic features	3m 30s
Test on windows-latest with basic features	8m 22s
Test on macOS-latest with basic features	3m 13s
Test on ubuntu-latest with all features	3m 49s
Test on windows-latest with all features	8m 36s
Test on macOS-latest with all features	4m 20s
	38m 3s

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