v0.5.0

What's Changed

• Feat: no custom borsh serialize by @billythedummy in #40
• Don't generate _verify_privilege() fn if no privileged accounts by @billythedummy in #41
• Breaking: don't generate *IxArgs struct if no instruction args by @billythedummy in #42
• don't generate accounts stuff if no accounts by @billythedummy in #43
• Remove all reference types by @billythedummy in #44

Full Changelog: v0.4.0...v0.5.0