Update acorn dependency (via eslint) https://github.com/advisories/GHSA-6chw-6frg-f759

libraries/logger/package.json

@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "chai": "4.2.0",
-    "eslint": "^4.18.1",
+    "eslint": "^6.6.0",
     "eslint-config-prettier": "^3.1.0",
     "eslint-config-standard": "^11.0.0",
     "eslint-plugin-chai-expect": "^1.1.1",