updated webdriver dependency

Former-commit-id: 6861a80028849890fd76ed131dbbdb1e70f02e15

cli/package.json

@@ -10,7 +10,7 @@
 		"jsdom": "*",
 		"puppeteer-core": "*",
 		"request-promise-native": "*",
-		"selenium-webdriver": "4.0.0-alpha.5",
+		"selenium-webdriver": "4.0.0-alpha.7",
 		"strong-data-uri": "*",
 		"yargs": "*"
 	}