Amber ditched IE8 long ago, bump jQuery.

package.json

@@ -32,7 +32,7 @@
   },
   "dependencies": {
     "@ambers/lang": ">0.22.6",
-    "jquery": ">=1.7.0"
+    "jquery": ">=2"
   },
   "devDependencies": {
     "@ambers/contrib-legacy": ">=0.7.1",