Fix import issue by targeting ES5

Author: WesCossick

tsconfig.json

@@ -11,7 +11,7 @@
 		"sourceMap": true,
 		"strict": true,
 		"strictNullChecks": true,
-		"target": "es6"
+		"target": "es5"
 	},
 	"include": ["src/**/*"]
 }