Bump lit-html version

RSLGTM'd by @azakus

Author: Steven Orvell

package.json

@@ -39,7 +39,7 @@
   },
   "typings": "lit-element.d.ts",
   "dependencies": {
-    "lit-html": ">=0.11.0-dev.3 <2.0.0"
+    "lit-html": "^0.11.0"
   },
   "publishConfig": {
     "access": "public"