Updated raven-js to 3.19.1

package.json

@@ -49,7 +49,7 @@
     "po-catalog-loader": "^1.2.0",
     "prop-types": "^15.5.10",
     "query-string": "2.4.2",
-    "raven-js": "3.18.1",
+    "raven-js": "3.19.1",
     "react": "15.3.2",
     "react-addons-css-transition-group": "15.3.2",
     "react-addons-pure-render-mixin": "15.3.2",