move to separate workflow with tests run once

.github/workflows/coverage.yml

@@ -0,0 +1,22 @@
+name: Workflow for Codecov conjugate
+on: [push, pull_request]
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+      - name: Install dependencies
+        run: pip install . pytest pytest-cov pytest-mpl pypika 
+      - name: Run tests and collect coverage
+        run: pytest --mpl --mpl-baseline-path=tests/example-plots --cov conjugate --cov-report=xml --cov-report=term-missing tests
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4.0.1
+        with: 
+          token: $${ secrets.CODECOV_TOKEN }}
+          slug: wd60622/conjugate
+          fail_ci_if_error: false

.github/workflows/tests.yml

@@ -23,10 +23,3 @@ jobs:
         pip install tox tox-gh-actions
     - name: Test with tox
       run: tox
-    - name: Upload coverage reports to Codecov
-      uses: codecov/codecov-action@v4.0.1
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        name: ${{ matrix.python-version }}
-        slug: wd60622/conjugate
-        fail_ci_if_error: false