Fix support for Node 8

Author: ehmicky

package.json

@@ -57,9 +57,9 @@
     "@babel/runtime": "^7.4.3",
     "auto-changelog": "^1.13.0",
     "ava": "^2.4.0",
-    "babel-eslint": "^10.0.1",
+    "babel-eslint": "^10.0.3",
     "babel-loader": "^8.0.5",
-    "eslint": "^6.6.0",
+    "eslint": "^5.16.0",
     "eslint-config-prettier": "^6.5.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-node": "^10.0.0",