fix macos docker in CI (#175)

* pin docker to 20.10.9

* docker 2.10.9 url?

* try vbox host networking change

* disable other jobs for testing

* disable other jobs for testing

* once more, with feeling!

* chownin around

* restore tests

.github/actions/macos-docker/action.yml

@@ -11,6 +11,11 @@ runs:
       run: |
         mkdir -p ~/.docker/machine/cache
         curl -Lo ~/.docker/machine/cache/boot2docker.iso https://github.com/boot2docker/boot2docker/releases/download/v19.03.12/boot2docker.iso
+
+        sudo mkdir -p /etc/vbox
+        sudo chown -R $(whoami) /etc/vbox
+        sudo echo '* 0.0.0.0/0 ::/0' > /etc/vbox/networks.conf
+
         brew install docker-machine docker
         docker --version
         docker-machine create --driver virtualbox default