Bump outcome from 1.1.0 to 1.2.0 in /dependencies/default (#372)

Bumps [outcome](https://github.com/python-trio/outcome) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/python-trio/outcome/releases)
- [Commits](python-trio/outcome@v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: outcome
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

dependencies/default/constraints.txt

@@ -8,7 +8,7 @@ importlib-metadata==4.11.4
 iniconfig==1.1.1
 mypy==0.961
 mypy-extensions==0.4.3
-outcome==1.1.0
+outcome==1.2.0
 packaging==21.3
 pluggy==1.0.0
 py==1.11.0