Added a few README tweaks

README.md

@@ -10,30 +10,26 @@ This utility switches the audio source for Mac OS X.
 
 You specify the name of the audio source, such as Built-in Digital Output, and the utility switches the source immediately without any GUI interaction.
 
-This is a command-line utility only and has no graphical user interface. Tested on OS 10.7 - 10.13.
+This is a command-line utility only and has no graphical user interface. Tested on OS 10.7 - 11.2.
 
 Installing from homebrew
 ------------------------
 ```
 $ brew install switchaudio-osx
 ```
 
-Installing Xcode Command Line Tools
------------------------------------
-switchaudio-osx requires command line tools to be installed from OS X. To install command line tools in Xcode 4.4, from the menubar go to Xcode > Preferences and click the Downloads tab. Click "Install" on the line that reads "Command Line Tools". 
-
 Usage
 -----
 
-SwitchAudioSource [-a] [-c] [-t type] [-n] -s device\_name | -i device\_id | -u device\_uid 
+SwitchAudioSource [-a] [-c] [-f format] [-t type] [-n] -s device\_name | -i device\_id | -u device\_uid 
 
  - **-a** : shows all devices
  - **-c** : shows current device
  - **-f** _format_ : output format (cli/human/json). Defaults to human.
  - **-t** _type_ : device type (input/output/system). Defaults to output.
  - **-n** : cycles the audio device to the next one
  - **-i** _device_id_ : sets the audio device to the given device by id
- - **-u** _device_uid_  : sets the audio device to the given device by uid or a substring of the uid
+ - **-u** _device_uid_ : sets the audio device to the given device by uid or a substring of the uid
  - **-s** _device_name_ : sets the audio device to the given device by name
 
 
@@ -46,7 +42,6 @@ License
 -------
 
 MIT License, see license.txt 
-Copyright (c) 2008-2011 Devon Weller <[email protected]> 
-Copyright (c) 2011 Christian Zuckschwerdt <[email protected]>
 
-Imported from SVN at http:https://code.google.com/p/switchaudio-osx/
+Copyright (c) 2008-2021 Devon Weller <[email protected]> 
+Copyright (c) 2011 Christian Zuckschwerdt <[email protected]>