travis: bump macOS ruby to 2.6.6
@@ -211,8 +211,8 @@ matrix:
before_install:
- |
if [ "$TRAVIS_OS_NAME" = 'osx' ]; then
- rvm install 2.6.5
- rvm use 2.6.5
+ rvm install 2.6.6
+ rvm use 2.6.6
gem install test-unit --no-document
if [ "$CC" = 'gcc' ]; then
brew upgrade gcc@9
