Measure code coverage for test folder too (#304)

Author: gdalle

.github/workflows/Test.yml

@@ -86,7 +86,7 @@ jobs:
           JULIA_DI_TEST_GROUP: ${{ matrix.group }}
       - uses: julia-actions/julia-processcoverage@v1
         with:
-          directories: ./DifferentiationInterface/src,./DifferentiationInterface/ext
+          directories: ./DifferentiationInterface/src,./DifferentiationInterface/ext,./DifferentiationInterface/test
       - uses: codecov/codecov-action@v4
         with:
           files: lcov.info
@@ -135,7 +135,7 @@ jobs:
           JULIA_DI_TEST_GROUP: ${{ matrix.group }}
       - uses: julia-actions/julia-processcoverage@v1
         with:
-          directories: ./DifferentiationInterfaceTest/src,./DifferentiationInterfaceTest/ext
+          directories: ./DifferentiationInterfaceTest/src,./DifferentiationInterfaceTest/ext,./DifferentiationInterfaceTest/test
       - uses: codecov/codecov-action@v4
         with:
           files: lcov.info