build(deps-dev): bump mypy from 1.1.1 to 1.2.0 (#600)

Bumps [mypy](https://github.com/python/mypy) from 1.1.1 to 1.2.0.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v1.1.1...v1.2.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  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]

demos/graphql-demo/requirements-dev.txt

@@ -11,7 +11,7 @@ graphql-ws==0.4.4
 psycopg2-binary==2.9.6
 redis==4.5.4
 
-mypy==1.1.1
+mypy==1.2.0
 flake8==6.0.0
 pytest==7.2.2
 pytest-cov==4.0.0

demos/moderator/requirements-dev.txt

@@ -11,7 +11,7 @@ flake8==6.0.0
 flake8-bugbear==23.3.12
 flake8-quotes==3.3.2
 ipdb==0.13.13
-mypy==1.1.1
+mypy==1.2.0
 pytest==7.2.2
 pytest-aiohttp==1.0.4
 pytest-asyncio==0.21.0