chore: fix contentful eslint

revert eslint plugin not compatible with eslint 5

Author: dpinol

packages/botonic-plugin-contentful/package.json

@@ -37,7 +37,7 @@
     "@types/memoizee": "^0.4.3",
     "@types/moment-timezone": "^0.5.12",
     "@types/node": "^13.1.6",
-    "@typescript-eslint/eslint-plugin": "^2.20.0",
+    "@typescript-eslint/eslint-plugin": "^1.13.0",
     "@typescript-eslint/parser": "^1.13.0",
     "eslint": "^5.16.0",
     "eslint-config-prettier": "^5.1.0",