Update dependency webdriver-manager to v12.1.9

Author: renovate[bot]

package.json

@@ -7,7 +7,7 @@
     "chromedriver": "90.0.1",
     "mocha": "8.4.0",
     "selenium-webdriver": "4.0.0-beta.4",
-    "webdriver-manager": "12.1.8"
+    "webdriver-manager": "12.1.9"
   },
   "description": "Selenium-WebDriver end-to-end test automation boilerplate. Using Commonjs, Mocha and Assert.",
   "devDependencies": {