Skaffold 2.0

Online Boutique now uses skaffold v2.
If you're developing for Online Boutique, you'll need skaffold v2+ on your machine.

To check your current version of skaffold:

skaffold version

To upgrade, simply reinstall skaffold (by redownloading the appropriate skaffold binary and replacing your existing /usr/local/bin/skaffold).
For instance, on my Mac, I did:

curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/latest/skaffold-darwin-amd64 && \
sudo install skaffold /usr/local/bin/