v0.2.1

Added

• Support for Str as local variables
• Allow assigning one Str variable to another Str variable
  • Str are two name.ptr and name.size local variables under the hood, so this is equivalent to first.ptr = second.ptr; first.size = second.size
• Allow assigning call returning Str to Str variable

Full Changelog: v0.2.0...v0.2.1