Update linting packages

Author: renovate-bot

package-lock.json

@@ -23,15 +23,15 @@
   },
   "devDependencies": {
     "dotenv-safe": "8.2.0",
-    "eslint": "6.8.0",
+    "eslint": "7.0.0",
     "eslint-config-airbnb-base": "14.1.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
     "eslint-plugin-prettier": "3.1.2",
     "husky": "4.2.3",
     "jest": "25.1.0",
     "lint-staged": "10.0.8",
-    "prettier": "1.19.1"
+    "prettier": "2.0.5"
   },
   "dependencies": {
     "ethers": "4.0.45"