0.13.0

• style: change max line length to 88
• style: clean up test code styles
• feat: support subscript node for varname (#104)
• ci: remove python3.8 from CI
• breaking!: varname of a.b now returns "a.b" instead of "a"

What's Changed

• 0.13.0 by @pwwang in #105

Full Changelog: 0.12.2...0.13.0