Update criterion requirement from 0.4 to 0.5 (#52) #79

Job	Run time
(OS X) Builds (aarch64-apple-ios)	1m 57s
(OS X) Builds (x86_64-apple-darwin)	2m 21s
Check (stable)	22s
Bench Compile (stable)	1m 54s
(Windows) Builds (x86_64-pc-windows-msvc)	58s
Check (beta)	17s
(Linux) Builds (aarch64-linux-android)	2m 5s
Check (1.70.0)	19s
(Linux) Builds (x86_64-unknown-linux-musl)	2m 0s
Rustfmt (nightly)	17s
(Linux) Builds (wasm32-unknown-unknown)	1m 22s
Test Suite (stable)	1m 57s
Test Suite (1.70.0)	2m 3s
	17m 52s

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