Add selenium-webdriver to devDependencies.

Author: prameshj

packages/auth/package.json

@@ -106,7 +106,6 @@
     "@firebase/logger": "0.3.4",
     "@firebase/util": "1.7.3",
     "node-fetch": "2.6.7",
-    "selenium-webdriver": "4.5.0",
     "tslib": "^2.1.0"
   },
   "license": "Apache-2.0",
@@ -118,6 +117,7 @@
     "rollup": "2.79.1",
     "rollup-plugin-sourcemaps": "0.6.3",
     "rollup-plugin-typescript2": "0.31.2",
+    "selenium-webdriver": "4.5.0",
     "typescript": "4.2.2",
     "@types/express": "4.17.14"
   },