1.2.0

What's Changed

• Feat/websocket extension by @Bo-kang in #6
• Minor/example by @Bo-kang in #8
• minor: add read me by @Bo-kang in #9
• Release/1.0.0 by @Bo-kang in #10
• Release/1.0.0 by @Bo-kang in #11
• Feat/version up to 21 by @Bo-kang in #12

Full Changelog: 0.0.4...1.2.0