Revert "Remove travis-ci macOS from docs/examples"

This reverts commit 5de574d36820c2481f4e7557ed6aa0e431ee3e63.

examples/travis-ci-deploy.yml

@@ -9,6 +9,9 @@ jobs:
   include:
     # perform a linux build
     - services: docker
+    # and a mac build
+    - os: osx
+      language: shell
     # and a windows build
     - os: windows
       language: shell

examples/travis-ci-minimal.yml

@@ -15,6 +15,9 @@ jobs:
     # perform a linux S390X build
     - services: docker
       arch: s390x
+    # and a mac build
+    - os: osx
+      language: shell
     # and a windows build
     - os: windows
       language: shell

examples/travis-ci-test-and-deploy.yml

@@ -62,6 +62,16 @@ jobs:
       after_success: |
         python3 -m pip install twine
         python3 -m twine upload --skip-existing wheelhouse/*.whl
+    # Deploy on mac
+    - stage: deploy
+      name: Build and deploy macOS wheels
+      os: osx
+      language: shell
+      install: python3 -m pip install cibuildwheel==1.11.0
+      script: python3 -m cibuildwheel --output-dir wheelhouse
+      after_success: |
+        python3 -m pip install twine
+        python3 -m twine upload --skip-existing wheelhouse/*.whl
     # Deploy on windows
     - stage: deploy
       name: Build and deploy Windows wheels