Clean up npm-installed packages

package.json

@@ -11,7 +11,7 @@
     "jquery-migrate": "^1.4.1",
     "jquery.scrollto": "~2.1.2",
     "picturefill": "~3.0.2",
-    "requirejs": "~2.1.22",
+    "requirejs": "~2.3.2",
     "uglify-js": "2.7.0",
     "underscore": "~1.8.3",
     "underscore.string": "~3.3.4"
@@ -34,6 +34,7 @@
     "karma-spec-reporter": "^0.0.20",
     "pa11y": "4.0.1",
     "pa11y-reporter-json-oldnode": "1.0.0",
-    "plato": "1.2.2"
+    "plato": "1.2.2",
+    "squirejs": "^0.1.0"
   }
 }