umapi-client v2.21

• 3c3d725 buid with newer poetry and drop 3.6 build
• c65be58 upgrade to newer version of cryptography
• 74e8c1e remove old docs
• f8dda00 #104 removing test_delete_account_enterpriseid and test_delete_account_adobeid
• bd701c4 #104 remove removeFromDomain action