v0.3.0

What's Changed

• chore: upgrade dependencies by @DanielSchiavini in #22
• feat: output_format by @DanielSchiavini in #21
• feat: Detect Vyper version from source by @DanielSchiavini in #23
• fix: reject npm-style version specifiers above v0.4.0 by @DanielSchiavini in #24
• Add a hint with the correct version specifier by @DanielSchiavini in #25

Full Changelog: v0.2.1...v0.3.0