Tests

fix(precompile): inherit Prague precompiles from Cancun #3364

Job	Run time
check no-default-features	23s
check serde	21s
check std	27s
clippy	1m 23s
docs	1m 18s
fmt	13s
test stable --no-default-features	59s
test no_std	25s
test stable	55s
test stable --all-features	1m 38s
test beta --no-default-features	1m 0s
test beta	56s
test beta --all-features	1m 29s
test nightly --no-default-features	53s
test nightly	1m 3s
test nightly --all-features	1m 34s
	14m 57s

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