test macos build

Author: DanielBok

.github/workflows/build.yml

@@ -72,10 +72,12 @@ jobs:
           CIBW_SKIP: "*-manylinux_i686 *-musllinux*"
           # use latest build
           CIBW_MANYLINUX_X86_64_IMAGE: quay.io/pypa/manylinux2014_x86_64
-          CIBW_BEFORE_ALL_MACOS: brew install swig
+          CIBW_BEFORE_ALL_MACOS: |
+            brew install swig
+            which swig
           CIBW_BEFORE_BUILD: |
             pip install --upgrade pip
-            pip install numpy swig==4.0.0
+            pip install numpy swig
         run: |
           python -m pip install -U pip cibuildwheel==2.18.1
           python -m cibuildwheel --output-dir dist