AdminElement: Use Redux.

 - Imports es-module-shims.
 - Adds an importmap via es-module-shims.
 - Makes the “switch” button flip a boolean flag in the state
   and uses it to modify the value shown.

Change-Id: Ie8042a4c434206f590ebde21fd67e84f48446c03
diff --git a/src/main/resources/META-INF/resources/package.json b/src/main/resources/META-INF/resources/package.json
index 265950c..a56863e 100644
--- a/src/main/resources/META-INF/resources/package.json
+++ b/src/main/resources/META-INF/resources/package.json
@@ -1,9 +1,10 @@
 {
   "dependencies": {
+    "es-module-shims": "^0.4.6",
     "lit-html": "^1.1.2",
-    "redux": "^4.0.5"
+    "normalize.css": "^8.0.1",
+    "redux": "^4.0.5",
+    "sanitize.css": "^11.0.0"
   },
-  "devDependencies": {
-    "browser-sync": "^2.26.7"
-  }
+  "devDependencies": {}
 }