ci: update ruby versions to test
Remove 2.3 and include 2.7 at versions which the macOS builds do support.
@@ -12,7 +12,7 @@ jobs:
strategy:
fail-fast: false
matrix:
- ruby: [ '2.3.7', '2.4.6', '2.5.5', '2.6.3' ]
+ ruby: [ '2.4.9', '2.5.7', '2.6.5', '2.7.0' ]
os: [ ubuntu-18.04, macOS-10.14 ]
runs-on: ${{ matrix.os }}
