fix gitMajor and gitMinor missing in version api (#4361)

* fix version missing
* suppress shellcheck warnings

hack/lib/version.sh

@@ -80,7 +80,8 @@ kube::version::get_version_vars() {
       # the "major" and "minor" versions and whether this is the exact tagged
       # version or whether the tree is between two tagged versions.
       if [[ "${KUBE_GIT_VERSION}" =~ ^v([0-9]+)\.([0-9]+)(\.[0-9]+)?([-].*)?([+].*)?$ ]]; then
-        # KUBE_GIT_MAJOR=${BASH_REMATCH[1]}
+        # shellcheck disable=SC2034 
+        KUBE_GIT_MAJOR=${BASH_REMATCH[1]}
         KUBE_GIT_MINOR=${BASH_REMATCH[2]}
         if [[ -n "${BASH_REMATCH[4]}" ]]; then
           KUBE_GIT_MINOR+="+"