Adding subresource integrity checks for cloudflare URLs (#1076)

Author: coheigea

_includes/layout/head.html

@@ -39,8 +39,8 @@
 <script src="https://kit.fontawesome.com/e0e120b2f0.js"></script>
 
 <!-- JQUERY -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js" integrity="sha256-ImQvICV38LovIsvla2zykaCTdEh1Z801Y+DSop91wMU=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js" integrity="sha256-1A78rJEdiWTzco6qdn3igTBv9VupN3Q1ozZNTR4WE/Y=" crossorigin="anonymous"></script>
 <script src="{{ "/js/jquery.navgoco.min.js" | prepend: site.baseurl }}"></script>
 
 <!-- FAVICONS  -->

_layouts/default.html

@@ -72,7 +72,7 @@
 
 <!-- Used for creating heading anchors -->
 <!-- Source: https://github.com/bryanbraun/anchorjs -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/2.0.0/anchor.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/2.0.0/anchor.min.js" integrity="sha256-Se2cNa4i303/27D+V3iMy2QI+whGR88DzeX6bh3/lnU=" crossorigin="anonymous"></script>
 <script>
   anchors.add('.anchored');
 </script>