2.2.1

Bug Fixes:

• Changed the lowest required version from 3.6 to 3.7.
• Fixed bug where script crashes if no builds are available for the selected version.
  We now display a message and exit.
• Fixed bug where option '--stats' fails if the selected version and build are invalid.

Other Fixes:

• Changed the lowest version required in the readme.
• Fixed some errors and typos in the readme.