Fixing clippy IntoIterator warnings (#123) #350

Job	Run time
Audit	12s
cargo fmt	21s
Build with no-std on wasm32-unknown-unknown	34s
cargo clippy	50s
Build with no-std on wasm32-unknown-unknown	37s
Taplo	3m 57s
Build with no-std on wasm32-unknown-unknown	41s
test (--features ristretto255-ciphersuite, stable)	1m 49s
Build with no-std on wasm32-unknown-unknown	27s
test (--features ristretto255-ciphersuite, 1.65.0)	4m 25s
Build with no-std on wasm32-unknown-unknown	29s
test (--features ristretto255-ciphersuite, --features danger, stable)	2m 23s
Build with no-std on wasm32-unknown-unknown	44s
test (--features ristretto255-ciphersuite, --features danger, 1.65.0)	5m 8s
Build with no-std on thumbv6m-none-eabi	29s
test (--features ristretto255-ciphersuite, --features serde, stable)	2m 6s
Build with no-std on thumbv6m-none-eabi	31s
Build with no-std on thumbv6m-none-eabi	30s
test (--features ristretto255-ciphersuite, --features serde, 1.65.0)	5m 9s
Build with no-std on thumbv6m-none-eabi	35s
test (stable)	1m 25s
Build with no-std on thumbv6m-none-eabi	31s
test (1.65.0)	4m 18s
Build with no-std on thumbv6m-none-eabi	38s
test (--features danger, stable)	1m 52s
test (--features danger, 1.65.0)	5m 2s
test (--features serde, stable)	2m 5s
test (--features serde, 1.65.0)	4m 56s
	52m 44s

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