v0.9.0

What's Changed

• docs: updated CHANGELOG.md by @github-actions in #188
• docs: add instructions on how to update MINIMUM_NUMAFLOW_VERSION by @KeranYang in #189
• feat: container-type level version compatibility check by @KeranYang in #190
• chore: streaming source by @kohlisid in #191
• fix: update side-input readme by @kohlisid in #194
• feat: streaming sink by @kohlisid in #193
• chore: update SideInput UDF example by @kohlisid in #195
• feat: streaming transformer by @kohlisid in #196
• feat: bi-directional streaming map by @kohlisid in #197
• chore: batch ack req and sink resp by @kohlisid in #199
• feat: update batchmap and mapstream to use Map proto by @kohlisid in #200
• chore: refactor reduce handler argument by @kohlisid in #201
• chore: update release version by @kohlisid in #202

Full Changelog: v0.8.0...v0.9.0