• Make transition from 1.x to 2.x version smoother (Closes #831)
• Fix "protocol" property (Closes #820)
• Fix publish() a bytearray payload (Closes #833)
• Fix some type annotations (Closes #828)
• Fix loop_stop() not stopping thread when called from callback (Closes #809)
• Fix some documentation errors (Closes #817, #823, #832, #838)
• Add support for Unix socket (Closes #829)
• Fix flaky test (Closes #789)