Bug Fix: Remove trailing slash from proxyOpts for custom server URL

Author: paffkata

lib/winappdriver.js

@@ -234,7 +234,7 @@ export class WinAppDriver {
     /** @type {import('@appium/types').ProxyOptions} */
     const proxyOpts = {
       log: this.log,
-      base: parsedUrl.pathname,
+      base: _.trimEnd(parsedUrl.pathname, '/'),
       server: parsedUrl.hostname,
       port: parseInt(parsedUrl.port, 10),
       scheme: _.trimEnd(parsedUrl.protocol, ':'),