Update dependency eslint to v7

Author: renovate-bot

package.json

@@ -63,7 +63,7 @@
     "@types/request": "^2.48.4",
     "@typescript-eslint/eslint-plugin": "^2.26.0",
     "@typescript-eslint/parser": "^2.21.0",
-    "eslint": "^6.8.0",
+    "eslint": "^7.0.0",
     "eslint-config-airbnb-typescript": "^7.2.0",
     "eslint-config-prettier": "^6.10.1",
     "eslint-plugin-import": "^2.20.2",