Merge pull request #4 from premyslruzickajr/master

Add tslib@^2.0.0 dependency

Author: dantleech

package.json

@@ -58,5 +58,6 @@
         "webpack-cli": "^3.3.4"
     },
     "dependencies": {
+        "tslib": "^2.0.0"
     }
 }