we're -safe-string compatible now

.travis.yml

@@ -25,8 +25,6 @@ env:
     - OPAMYES=1
     # make variables
     - ADD_REVISION=1
-    # https://github.com/HaxeFoundation/haxe/issues/6749
-    - OCAMLPARAM="safe-string=0,_"
     # nightly builds submit
     - secure: "UoGjYvQqt66GWmeLC4Pih1iue5AufVgW8XQOd2Bx839NN/2mQQ9bD1HuONJe+taWBJ+PHInkAjYROYYaiCQUA7B1SXs3oQD7Og6arVcR7kY7XOdAQ2t8ZkxJHTnuYGWW/2gNFBESv+3H17bkXG4rzaSn2LV5PJLOxSjw0ziBUMY="
     - secure: "ugpxt+zeYiAiMYKLK96f5TLSxbQAtmDWiumdwaLHl88fIUeefxJJPIF1Xm0AHeYEJE7sD8dLE1dMbRSzOpXFfTmJoQZv19Wjv+2N5B+DaabKjGj1nZG7q3blGa3nUYzWVfFNFiIpM9c5fvW8yiUFzacZE5itEY8+lZQeGsNh+WQ="

libs

@@ -1 +1 @@
-Subproject commit c02c91094ccdb12c29c8ed7b02bc9276cde710da
+Subproject commit c368bdc1c7b7dc4fb85613ffcc08578e23f40a6a