Fail remote pipeline when mypy fails

.github/workflows/pythonpackage.yml

@@ -103,7 +103,6 @@ jobs:
         PYTHON_VERSION: ${{ matrix.python-version }}
       # With new versions of mypy new issues might arise. This is a problem if there is
       # nobody able to fix them, so we have to ignore errors until that changes.
-      continue-on-error: true
 
     - name: Test with pytest
       run: |

pyproject.toml

@@ -19,7 +19,6 @@ testpaths = "test"  # Space separated list of paths from root e.g test tests doc
 # filterwarnings ignore::WarningType  # ignores those warnings
 
 [tool.mypy]
-python_version = "3.8"
 files = ["git/", "test/deprecation/"]
 disallow_untyped_defs = true
 no_implicit_optional = true