Release v0.3.0

What's Changed

• Typo in readme. (8d41c58)
• 0.3.0 (1d5938b)
• Dynamic Imports for keytar module in keychain. (2c963b2)
• Implementing keychain abstraction. (8525e46)
• Updated BrokerAuthManager overview in README. (ae57c93)
• Use machine-bound encryption that combines OS-level security (keychain) rather than user provided password. (0464de6)

Full Changelog: v0.2.0...v0.3.0