Bump to version 0.4.0 #114

Job	Run time
Test	21s
Cross (1.63.0)	55s
Cross (stable)	11s
Build (ubuntu-latest, 1.63.0)	43s
Cross (beta)	15s
Build (ubuntu-latest, stable)	5s
Cross (nightly)	18s
Build (ubuntu-latest, beta)	12s
Build (ubuntu-latest, nightly)	15s
Build (macos-latest, 1.63.0)	50s
Build (macos-latest, stable)	9s
Build (macos-latest, beta)	15s
Build (macos-latest, nightly)	16s
Build (windows-latest, 1.63.0)	1m 19s
Build (windows-latest, stable)	1m 13s
Build (windows-latest, beta)	34s
Build (windows-latest, nightly)	32s
	8m 23s

Provide feedback