add keywords

Author: lifeart

package.json

@@ -8,6 +8,10 @@
     "Thomas Sauer <t-sauer@outlook.de>"
   ],
   "license": "MIT",
+  "keywords": [
+    "ember",
+    "language-server"
+  ],
   "repository": {
     "type": "git",
     "url": "https://github.com/lifeart/ember-language-server.git"