build(deps): bump log from 0.4.18 to 0.4.20 #1682

Job	Run time
cargo_fmt	4s
cross_build (aarch64-unknown-linux-musl)	3m 6s
cargo_test (ubuntu-20.04)	36s
cargo_test_msrv	2m 21s
cross_build (arm-linux-androideabi)	3m 9s
cargo_test (macOS-11)	1m 35s
cross_build (arm-unknown-linux-musleabi)	2m 59s
cross_build (arm-unknown-linux-musleabihf)	3m 11s
build_for_mac (x86_64-apple-darwin)	5m 17s
cross_build (armv5te-unknown-linux-musleabi)	3m 6s
build_for_mac (aarch64-apple-darwin)	5m 13s
cross_build (armv7-linux-androideabi)	3m 12s
docker	5m 55s
cross_build (armv7-unknown-linux-musleabihf)	3m 0s
cross_build (armv7-unknown-linux-musleabi)	3m 8s
cross_build (i586-unknown-linux-musl)	2m 58s
cross_build (i686-linux-android)	3m 7s
cross_build (i686-unknown-linux-musl)	3m 11s
cross_build (x86_64-linux-android)	3m 13s
cross_build (x86_64-pc-windows-gnu)	3m 14s
cross_build (x86_64-unknown-linux-musl)	3m 4s
linux_operational_test	22s
release_if_tag_exits	4s
	1h 5m 5s

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