chore: update readme/api

Author: pimlie

README.md

@@ -100,6 +100,7 @@ describe('my e2e test', () => {
       // if true or undefined then Xvfb is automatically started before
       // the browser and the displayNum=99 added to the process.env
       xvfb: false,
+      quiet: false,
       folder: process.cwd(),
       staticServer: {
         host: 'localhost', // or set process.env.HOST

docs/API.md

@@ -12,6 +12,11 @@
 The local folder with static html files you wish to test. This folder is used both by browserstack-local and the static webserver.
 If you dont use either of those, the files will be loaded through the `file://` protocol.
 
+### `quiet`
+_boolean_ (default: `false`)
+
+If tue then information logging eg by static server and xvfb wont show
+
 ### `xvfb`
 _boolean_ (default: `true`)