Bump version number to 0.1.9

Author: meisyal

package.json

@@ -5,7 +5,7 @@
   "homepage": "https://github.com/meisyal/staruml-ruby",
   "issues": "https://github.com/meisyal/staruml-ruby/issues",
   "keywords": ["ruby"],
-  "version": "0.1.8",
+  "version": "0.1.9",
   "author": {
     "name": "Andrias Meisyal",
     "email": "andriasonline@gmail.com",