build(deps-dev): bump eslint from 6.3.0 to 6.4.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.3.0 to 6.4.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.3.0...v6.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package-lock.json

@@ -1334,9 +1334,9 @@
       }
     },
     "eslint": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.3.0.tgz",
-      "integrity": "sha512-ZvZTKaqDue+N8Y9g0kp6UPZtS4FSY3qARxBs7p4f0H0iof381XHduqVerFWtK8DPtKmemqbqCFENWSQgPR/Gow==",
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.4.0.tgz",
+      "integrity": "sha512-WTVEzK3lSFoXUovDHEbkJqCVPEPwbhCq4trDktNI6ygs7aO41d4cDT0JFAT5MivzZeVLWlg7vHL+bgrQv/t3vA==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",

package.json

@@ -31,7 +31,7 @@
     "xmlhttprequest": "^1.8.0"
   },
   "devDependencies": {
-    "eslint": "^6.3.0",
+    "eslint": "^6.4.0",
     "jest": "^24.9.0"
   }
 }