Fix renovate auto merge config

[svartkanin]

Auto merge was not working ever as the wrong type was supplied

[codefiles]

LGTM

This comment is mostly to document how I reviewed this.

To check locally using a Renovate container:

$ podman pull docker.io/renovate/renovate
$ podman run \
>	--tty \
>	--rm \
>	--volume ./:/usr/src/app \
>	--env LOG_LEVEL=debug \
>	renovate --platform=local

Below is an excerpt of the mypy section from DEBUG: packageFiles with updates (repository=local)

         "poetry": [
           {
             "deps": [
               ...
               {
                 "packageName": "mypy",
                 "depName": "mypy",
                 "datasource": "pypi",
                 "depType": "project.optional-dependencies",
                 "currentValue": "==2.3.0",
                 "currentVersion": "2.3.0",
                 "managerData": {"depGroup": "dev"},
                 "updates": [],
                 "versioning": "pep440",
                 "warnings": [],
                 "sourceUrl": "https://github.com/python/mypy",
                 "registryUrl": "https://pypi.org/pypi",
                 "changelogUrl": "https://mypy.readthedocs.io/en/latest/changelog.html",
                 "mostRecentTimestamp": "2026-07-13T11:28:38.000Z",
                 "currentVersionTimestamp": "2026-07-13T11:28:38.000Z",
                 "currentVersionAgeInDays": 22,
                 "fixedVersion": "2.3.0"
               },
               ...
             "packageFile": "pyproject.toml"
           }
         ],

This shows that for example, mypy will have the depType of project.optional-dependencies. This comes from the pyproject.toml file.

devDependencies is an npm dependency type, the wrong type for mypy. The matchDepTypes fails in this case and the automerge is not applied.

References:

• https://docs.renovatebot.com/modules/platform/local/
• https://docs.renovatebot.com/troubleshooting/#self-hosted
• https://docs.renovatebot.com/configuration-options/#packagerulesmatchdeptypes
• https://docs.npmjs.com/specifying-dependencies-and-devdependencies-in-a-package-json-file/