fix(package): update config to version 1.30.0

Closes #4306

package.json

@@ -157,7 +157,7 @@
     "bunyan": "1.8.12",
     "classnames": "2.2.5",
     "common-tags": "1.7.2",
-    "config": "1.29.2",
+    "config": "1.30.0",
     "deep-eql": "3.0.1",
     "dompurify": "1.0.2",
     "es6-error": "4.1.0",