build(deps): bump prettyplease from 0.2.19 to 0.2.20 #492

Job	Run time
build (1.60.0, thumbv7em-none-eabi)	1m 59s
build (1.60.0, wasm32-unknown-unknown)	1m 57s
cross (aarch64-unknown-linux-gnu, 1.60.0)	2m 12s
build (stable, thumbv7em-none-eabi)	13s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.60.0, sudo apt update && sudo apt install gcc-mult...	2m 20s
cross (aarch64-unknown-linux-gnu, stable)	48s
build (stable, wasm32-unknown-unknown)	14s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0)	1m 50s
cross (powerpc-unknown-linux-gnu, 1.60.0)	2m 11s
test (x86_64-pc-windows-msvc, windows-latest, 1.60.0)	2m 19s
cross (powerpc-unknown-linux-gnu, stable)	43s
test (x86_64-apple-darwin, macos-latest, 1.60.0)	1m 51s
minimal-versions / minimal-versions	28s
	19m 5s

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