Build: update Sizzle

Fixes gh-2042
Fixes gh-1969
Closes gh-1709

external/sizzle/LICENSE.txt

-Copyright 2008, 2014 jQuery Foundation and other contributors,
-https://jquery.org/
+Copyright jQuery Foundation and other contributors, https://jquery.org/
 
 This software consists of voluntary contributions made by many
 individuals. For exact contribution history, see the revision history

package.json

@@ -50,7 +50,7 @@
     "qunitjs": "1.17.1",
     "requirejs": "2.1.15",
     "sinon": "1.12.2",
-    "sizzle": "2.1.1",
+    "sizzle": "2.2.0",
     "testswarm": "1.1.0"
   },
   "scripts": {