4.9.0

What's Changed

• Update README.md to add the official document link by @jmatsu in #93
• Add Capture feature to README by @jmatsu in #94
• Add new callback interfaces split from DeployGateCallback by @satsukies in #95
• Add new callback interface to receive the Capture creation event by @satsukies in #96
• feat: collecting device states on SDK by @satsukies in #97
• read/write to JSONObject with thread-safe by @satsukies in #99
• Bumpup version to 4.9.0 by @satsukies in #98

Full Changelog: 4.8.0...4.9.0