v0.2.0-alpha.4

What's Changed

• Fix felt252 and enum deserialization bugs. by @azteca1998 in #844
• fix aot contract executor not passing builtinstats by @edg-l in #849
• Fix process block bug by @JulianGCalderon in #851
• Also fix felt bits in starknet syscall wrappers by @edg-l in #853
• Update version to alpha 4 by @edg-l in #854
• Better function attributes and re-enable >O1 opt by @edg-l in #843
• Resolve CAIRO_NATIVE_RUNTIME_LIBRARY relative path by @rodrigo-pino in #841

Full Changelog: v0.2.0-alpha.3...v0.2.0-alpha.4