Try including testing data in wheel

.github/workflows/build_tests.yml

@@ -80,6 +80,17 @@ jobs:
     - name: Import wntr
       run: |
         python -c "import wntr"
+    - name: Checkout requirements.txt
+      uses: actions/checkout@v4
+      with:
+        sparse-checkout: |
+          requirements.txt
+        sparse-checkout-cone-mode: false
+        fetch-depth: 1
+    - name: Test wntr
+      run: |
+        pip install -r requirements.txt
+        pytest --pyargs wntr.tests.test_sim_results
   pytest_coverage:
     runs-on: ${{ matrix.os }}
     strategy:

MANIFEST.in

@@ -12,3 +12,8 @@ include wntr/sim/network_isolation/numpy.i
 include wntr/tests/networks_for_testing/*.inp
 include wntr/library/msx/*.json
 include wntr/library/msx/*.msx
+include wntr/tests/networks_for_testing/*
+include wntr/tests/data_for_testing/*
+include examples/*
+include examples/demos/*
+include examples/networks/*