main
Move pkg/* used by client to client/pkg.
use the more efficient strings.Builder
fix: use require.NoError instead of t.Fatal(err) in client package
client/pkg: fix revive unexported-return issue
fix: use testify instead of t.Fatal or t.Error in client package (part 1)
chore: enable unnecessary-stmt rule from revive
Migrate dependencies pkg/foo -> client/pkg/foo