v6.4.2

Changelog

e84e89b bump 6.4.2
fb35da4 upload separately
d91ce7e bump 6.4.2
cbc55a8 add snapcraft back
0694d61 add upload asset to goreleaser #172
f102195 Merge pull request #175 from apeyrat/master
a557130 croc is now available in the main bucket