Fixing clippy IntoIterator warnings and Taplo issue #349

Job	Run time
cargo clippy	49s
test (--features ristretto255-ciphersuite, stable)	1m 28s
Audit	14s
test (--features ristretto255-ciphersuite, 1.65.0)	5m 16s
cargo fmt	19s
test (--features ristretto255-ciphersuite, --features danger, stable)	2m 8s
Build with no-std on wasm32-unknown-unknown	28s
test (--features ristretto255-ciphersuite, --features danger, 1.65.0)	5m 52s
Taplo	3m 34s
Build with no-std on wasm32-unknown-unknown	28s
test (--features ristretto255-ciphersuite, --features serde, stable)	2m 20s
Build with no-std on wasm32-unknown-unknown	35s
test (--features ristretto255-ciphersuite, --features serde, 1.65.0)	4m 59s
Build with no-std on wasm32-unknown-unknown	32s
test (stable)	1m 22s
Build with no-std on wasm32-unknown-unknown	38s
test (1.65.0)	4m 21s
test (--features danger, stable)	1m 55s
Build with no-std on wasm32-unknown-unknown	33s
test (--features danger, 1.65.0)	4m 54s
Build with no-std on thumbv6m-none-eabi	37s
test (--features serde, stable)	2m 50s
Build with no-std on thumbv6m-none-eabi	27s
test (--features serde, 1.65.0)	5m 55s
Build with no-std on thumbv6m-none-eabi	40s
Build with no-std on thumbv6m-none-eabi	34s
Build with no-std on thumbv6m-none-eabi	29s
Build with no-std on thumbv6m-none-eabi	36s
	54m 53s

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