fix(sauce): bring back sauceProxy as a configuration option

lib/config.ts

@@ -97,9 +97,14 @@ export interface Config {
    */
   seleniumSessionId?: string;
   /**
-   * The address of a proxy server to use for the connection to the
-   * Selenium Server. If not specified no proxy is configured. Looks like
-   * webDriverProxy: 'http://localhost:3128'
+   * The address of a proxy server to use for communicating to Sauce Labs rest APIs via the
+   * saucelabs node module. For example, the Sauce Labs Proxy can be setup with: sauceProxy:
+   * 'http://localhost:3128'
+   */
+  sauceProxy?: string;
+
+  /**
+   * The proxy address that browser traffic will go through which is tied to the browser session.
    */
   webDriverProxy?: string;
 

lib/driverProviders/sauce.ts

@@ -58,7 +58,7 @@ export class Sauce extends DriverProvider {
       username: this.config_.sauceUser,
       password: this.config_.sauceKey,
       agent: this.config_.sauceAgent,
-      proxy: this.config_.webDriverProxy
+      proxy: this.config_.sauceProxy
     });
     this.config_.capabilities['username'] = this.config_.sauceUser;
     this.config_.capabilities['accessKey'] = this.config_.sauceKey;