Merge pull request #202 from travis-ci/go1718

Add go 1.17 and 1.18

Author: r-arek

gimme

@@ -285,7 +285,7 @@ _extract() {
 
 # _setup_bootstrap
 _setup_bootstrap() {
-	local versions=("1.16" "1.15" "1.14" "1.13" "1.12" "1.11" "1.10" "1.9" "1.8" "1.7" "1.6" "1.5" "1.4")
+	local versions=("1.18" "1.17" "1.16" "1.15" "1.14" "1.13" "1.12" "1.11" "1.10" "1.9" "1.8" "1.7" "1.6" "1.5" "1.4")
 
 	# try existing
 	for v in "${versions[@]}"; do