chore(package): update standard to version 13.0.1

Author: greenkeeper[bot]

package.json

@@ -42,7 +42,7 @@
  "rxjs": "^6.5.2",
  "sinon": "^7.3.2",
  "source-map-loader": "^0.2.4",
- "standard": "^12.0.1",
+ "standard": "^13.0.1",
  "ts-jest": "^24.0.2",
  "ts-loader": "^6.0.2",
  "tslint": "^5.17.0",