v0.1.0-alpha.21

Full Changelog: v0.1.0-alpha.20...v0.1.0-alpha.21

Relevant changes

• fix(try): propagate errors from assignment calls (113f99a)
• feat(match): support exhaustive match for enums (ee924a5)
• feat(jiklib/argparse): add parser description (fbbfe8f)
• fix(parser): add missing newline eat for vector literal (44404ea)
• fix(jiklib): simplify exception handling, add missing checks (40d4786)
• fix(jiklib/io): proper exception handling in read_file and write_file (032ba74)
• fix(compiler): better error message for binop type mismatch (c72c817)