chore(package): update eslint-plugin-promise to version 4.2.1

Closes #219

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "chai-as-promised": "7.1.1",
     "electron-rebuild": "1.8.4",
     "eslint-plugin-import": "2.16.0",
-    "eslint-plugin-promise": "4.0.1",
+    "eslint-plugin-promise": "4.2.1",
     "eslint-plugin-react": "7.12.4",
     "mocha": "6.0.2",
     "mocha-appveyor-reporter": "0.4.2",