Merge pull request #18 from oscarbenjamin/pr_dev

Improve dev workflow

Author: oscarbenjamin

Diff for: .github/workflows/tests.yml

@@ -14,7 +14,6 @@ jobs:
         include:
           - { python-version: 3.9, os: ubuntu-latest, session: "mypy" }
           - { python-version: 3.9, os: ubuntu-latest, session: "tests" }
-          - { python-version: 3.8, os: ubuntu-latest, session: "mypy" }
           - { python-version: 3.8, os: ubuntu-latest, session: "tests" }
           - { python-version: 3.9, os: ubuntu-latest, session: "pre-commit" }
           - { python-version: 3.9, os: ubuntu-latest, session: "safety" }