0.4.0

What's Changed

• Release 0.4.0-rc0 by @lujiajing1126 in #40
• Remove ID related APIs by @lujiajing1126 in #41
• Use client-local metadata cache by @lujiajing1126 in #42
• Add stream create without timestamp by @lujiajing1126 in #43

Full Changelog: v0.4.0-rc0...v0.4.0