Bump (peer) dependencies to ESLint 5.6 (facebook#5050)

Author: Jack Zhao

package.json

@@ -19,7 +19,7 @@
     "precommit": "lint-staged"
   },
   "devDependencies": {
-    "eslint": "4.19.1",
+    "eslint": "5.6.0",
     "execa": "1.0.0",
     "husky": "^0.14.3",
     "lerna": "2.9.1",

packages/react-error-overlay/package.json

@@ -42,7 +42,7 @@
     "chalk": "^2.3.2",
     "chokidar": "^2.0.2",
     "cross-env": "5.1.4",
-    "eslint": "4.19.1",
+    "eslint": "5.6.0",
     "eslint-config-react-app": "^2.1.0",
     "eslint-plugin-flowtype": "2.46.1",
     "eslint-plugin-import": "2.9.0",

packages/react-scripts/package.json

@@ -36,7 +36,7 @@
     "css-loader": "0.28.11",
     "dotenv": "6.0.0",
     "dotenv-expand": "4.2.0",
-    "eslint": "4.19.1",
+    "eslint": "5.6.0",
     "eslint-config-react-app": "^2.1.0",
     "eslint-loader": "2.1.1",
     "eslint-plugin-flowtype": "2.50.1",