Add build matrix for build / test steps to shake out OS nuances (#654)
Add build matrix for build / test steps to shake out OS nuances (#654)

Add build matrix for build / test steps to shake out OS nuances.

Remove macos-latest from build matrix.
russellhancox/santa,google/santa,russellhancox/santa,tburgin/santa,tburgin/santa,russellhancox/santa,tburgin/santa,google/santa,google/santa