Convert to chrono #897

Job	Run time
Build aarch64-apple-darwin target	2m 27s
assert_full_test_suite	7s
Build x86_64-pc-windows-msvc target	5m 23s
Build x86_64-unknown-linux-gnu target	4m 4s
Build x86_64-apple-darwin target	3m 43s
Build x86_64-unknown-linux-musl target	6m 9s
lint	2m 32s
rust-test	2m 46s
rust-test-vectors	3m 56s
test (ubuntu-latest)	2m 36s
test (macos-latest)	2m 28s
test (windows-latest)	2m 30s
kotlin-build-test-deploy-snapshot	1m 53s
kotlin-acceptance-test (ubuntu-latest)	10s
kotlin-acceptance-test (macos-latest)	17s
kotlin-acceptance-test (macos-12)	24s
kotlin-acceptance-test (windows-latest)	28s
	41m 53s

Provide feedback