Topic/default/deprecation cleanup

remove a deprecation warning for golang.org/x/crypto/ssh/terminal replacing it by golang.org/x/term

the cset is independent and can be moved wherever you want before phasing.

go.mod

@@ -22,6 +22,8 @@
 	golang.org/x/net v0.0.0-20200707034311-ab3426394381
 )
 
+require golang.org/x/term v0.12.0
+
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.1.1 // indirect