Added linting script

.eslintrc.json

@@ -1,4 +1,5 @@
 {
+  "extends": "airbnb",
   "rules": {
     "comma-dangle": ["error", "never"],
     "no-console": "off",
@@ -10,6 +11,5 @@
       "ExportDeclaration": "never"
     }],
     "object-curly-spacing": ["error", "always"]
-  },
-  "extends": "airbnb"
+  }
 }

package.json

@@ -20,5 +20,8 @@
     "eslint-plugin-import": "2.16.0",
     "eslint-plugin-jsx-a11y": "6.2.1",
     "eslint-plugin-react": "7.12.4"
+  },
+  "scripts": {
+    "lint": "eslint app/src --format table"
   }
 }