Update driver.js

Author: KazuCocoa

lib/driver.js

@@ -55,6 +55,7 @@ const MIN_CHROME_VERSION = 'Chrome/63.0.3239.0';
 const NO_PROXY = [
   ['POST', new RegExp('^/session/[^/]+/appium')],
   ['GET', new RegExp('^/session/[^/]+/appium')],
+  ['GET', new RegExp('^/session/[^/]+/context')],
   ['POST', new RegExp('^/session/[^/]+/execute/sync')],
 ];