Bug 1059 _and_ version-compat breackage of commit c78ceb642d0ef5bb5bf27ff8ff1495175ee2e983

Commit c78ceb642d0ef5bb5bf27ff8ff1495175ee2e983 changed:
  -    public static final String GL4   = "GL4";
  +    public static final String GL4   = "GL4".intern();

which is identified by semver as incompatible,
due to Bug 1059 (no more inlining of interned string references).