chore(package): update ts-loader to version 3.1.1

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "phantomjs-prebuilt": "2.1.15",
     "semver": "5.4.1",
     "should": "13.1.1",
-    "ts-loader": "3.1.0",
+    "ts-loader": "3.1.1",
     "tslib": "1.8.0",
     "tslint": "5.7.0",
     "tslint-loader": "3.5.3",