Update dependency @types/selenium-webdriver to v4.0.15

Author: renovate-bot

package-lock.json

@@ -15,7 +15,7 @@
   "devDependencies": {
     "@types/jest": "26.0.23",
     "@types/node": "13.13.52",
-    "@types/selenium-webdriver": "4.0.14",
+    "@types/selenium-webdriver": "4.0.15",
     "husky": "6.0.0",
     "lint-staged": "10.5.4",
     "prettier": "2.3.2",