Release v2.1.2

Features

• utils: add try_cartcher util #19 (Coder_Manuel)

Performance Improvements

• core: add abstraction to final classes and improve error handling #19 (Coder_Manuel)
• services: add patch request and params #19 (Coder_Manuel)
• chore: bump up version number #19 (Coder_Manuel)
• services: add TryCAtcher on post request #19 (Coder_Manuel)
• services: impl TryCatcher on NetworkRequest #19 (Coder_Manuel)
• services: replace FutureOr type #19 (Coder_Manuel)