appveyor.yml in metanorma-iso-1.2.2 vs appveyor.yml in metanorma-iso-1.2.3

- old
+ new

@@ -5,9 +5,10 @@ cache: - vendor/bundle environment: matrix: + - RUBY_VERSION: 26 - RUBY_VERSION: 25 - RUBY_VERSION: 24 - RUBY_VERSION: _trunk matrix: