Update versions of libraries in poetry.

PATCH bump source-merge version to 0.1.12
Build source-merge docker image for platform(s) linux/amd64, linux/arm64
Get dependency updates
Create or update pull request on Airbyte repository
Add changelog entry

Author: alafanechere

airbyte-integrations/connectors/source-merge/metadata.yaml

@@ -2,7 +2,7 @@ data:
   connectorSubtype: api
   connectorType: source
   definitionId: 23240e9e-d14a-43bc-899f-72ea304d1994
-  dockerImageTag: 0.1.11
+  dockerImageTag: 0.1.12
   dockerRepository: airbyte/source-merge
   githubIssueLabel: source-merge
   icon: merge.svg