chore(package): update typescript to version 2.6.1 (#103)

Author: greenkeeper[bot]

package.json

@@ -91,7 +91,7 @@
     "tsconfig-lint": "^0.12.0",
     "tslint": "^5.7.0",
     "tslint-loader": "^3.2.0",
-    "typescript": "~2.5.3",
+    "typescript": "~2.6.1",
     "url-loader": "^0.6.1",
     "webpack": "2.3.3",
     "webpack-dev-middleware": "^1.12.0",