Add CI build target for go 1.18
Looks like Tor Browser will be moving to go1.18 at some point (tpo/applications/tor-browser-build#40464 (closed)). We should make sure that snowflake works with that version of Go.
Looks like Tor Browser will be moving to go1.18 at some point (tpo/applications/tor-browser-build#40464 (closed)). We should make sure that snowflake works with that version of Go.