chore(deps): update dependency eslint to v7

Author: renovate-bot

package.json

@@ -100,7 +100,7 @@
     "css-loader": "^3.0.0",
     "deep-assign": "^2.0.0",
     "enquire-js": "^0.2.1",
-    "eslint": "^6.8.0",
+    "eslint": "^7.0.0",
     "eslint-config-prettier": "^6.10.1",
     "eslint-plugin-html": "^6.0.0",
     "eslint-plugin-markdown": "^2.0.0-alpha.0",