Merge pull request #2018 from atom/greenkeeper/eslint-5.15.3

Update eslint to the latest version 🚀

Author: vanessayuenn

package-lock.json

@@ -88,7 +88,7 @@
     "electron-mksnapshot": "~2.0",
     "enzyme": "3.8.0",
     "enzyme-adapter-react-16": "1.7.1",
-    "eslint": "5.15.2",
+    "eslint": "5.15.3",
     "eslint-config-fbjs-opensource": "1.0.0",
     "eslint-plugin-jsx-a11y": "6.2.1",
     "globby": "9.1.0",