v1.3 - Nuke 13 support

• v1.3 - 2021-08-10
  • Small fixes to support Nuke 13

v1.1 - bug fixes

Bug fixes.

• Fixed error in error handling when a shortcut is added for a menu item which disappers.
• nuke_setup method works as expected when installed earlier in NUKE_PATH. Previously it might run before some menu items were added, so the shortcut was never set.