Update rand_chacha requirement from 0.3 to 0.9 #205

Job	Run time
Bench (current, refs/pull/195/merge)	1m 16s
Test Suite (stable)	1m 17s
Rustfmt	2m 40s
Bench (base, main)	1m 20s
Builds (ubuntu-22.04, aarch64-linux-android)	1m 20s
Test Suite (beta)	1m 8s
Builds (ubuntu-22.04, x86_64-unknown-linux-musl)	1m 20s
Test Suite (1.70.0)	1m 21s
Builds (ubuntu-22.04, wasm32-unknown-unknown, --features wasm --no-default-features)	1m 17s
Builds (macos-13, aarch64-apple-ios)	25s
Builds (macos-13, x86_64-apple-darwin)	21s
Builds (macos-14, aarch64-apple-darwin)	1s
Builds (windows-2019, x86_64-pc-windows-msvc)	1m 17s
Upload benchmark results	0s
	15m 3s

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