use oldest-supported-numpy

Author: jswhit

.github/workflows/build-wheels.yml

@@ -62,26 +62,6 @@ jobs:
     - uses: docker/setup-qemu-action@v1
       if: ${{ matrix.platform == 'aarch64' }}
       name: Set up QEMU
-    - name: Pin Numpy version
-      run: |
-        if [ "$MB_PYTHON_VERSION" == '3.6' ]; then
-          echo "NP_BUILD_DEP=$(echo numpy==1.17.3)" >> $GITHUB_ENV;
-          echo "NP_TEST_DEP=$(echo numpy==1.17.3)" >> $GITHUB_ENV;
-        elif [ "$MB_PYTHON_VERSION" == '3.7' ]; then
-          echo "NP_BUILD_DEP=$(echo numpy==1.17.3)" >> $GITHUB_ENV;
-          echo "NP_TEST_DEP=$(echo numpy==1.17.3)" >> $GITHUB_ENV;
-        elif [ "$MB_PYTHON_VERSION" == '3.8' ]; then
-          echo "NP_BUILD_DEP=$(echo numpy==1.17.3)" >> $GITHUB_ENV;
-          echo "NP_TEST_DEP=$(echo numpy==1.17.3)" >> $GITHUB_ENV;
-        elif [ "$MB_PYTHON_VERSION" == '3.9' ]; then
-          echo "NP_BUILD_DEP=$(echo numpy==1.19.4)" >> $GITHUB_ENV;
-          echo "NP_TEST_DEP=$(echo numpy==1.19.4)" >> $GITHUB_ENV;
-        elif [ "$MB_PYTHON_VERSION" == '3.10' ]; then
-          echo "NP_BUILD_DEP=$(echo numpy==1.21.3)" >> $GITHUB_ENV;
-          echo "NP_TEST_DEP=$(echo numpy==1.21.3)" >> $GITHUB_ENV;
-        else
-          echo "None of the defined python version, use default"
-        fi
     - name: Setup Environment variables
       run: |
         if [ "schedule" == "${{ github.event_name }}" ] || [ "master" == "$BUILD_COMMIT" ]; then echo "TOKEN=$SCIPY_WHEELS_NIGHTLY_ACCESS" >> $GITHUB_ENV; else echo "TOKEN=$MULTIBUILD_WHEELS_STAGING_ACCESS" >> $GITHUB_ENV; fi
@@ -113,8 +93,8 @@ jobs:
         pip install virtualenv
     - name: Build and Install Wheels
       run: |
-        BUILD_DEPENDS="$NP_BUILD_DEP cython"
-        TEST_DEPENDS="$NP_TEST_DEP pytest pytest-cov"
+        BUILD_DEPENDS="oldest-supported-numpy cython"
+        TEST_DEPENDS="oldest-supported-numpy pytest pytest-cov"
         source multibuild/common_utils.sh
         source multibuild/travis_steps.sh
         echo "------- BEFORE INSTALL --------"