NoMethodError ruby or cocoa pods

Hello! When I used this plugin, I get this error.


```
NoMethodError - undefined method `sub' for <Pod::Version version=0.2.7.6>:Pod::Version
/Users/user/.rbenv/versions/2.6.0/lib/ruby/gems/2.6.0/bundler/gems/cocoapods-bazel-61eda975362f/lib/cocoapods/bazel/xcconfig_resolver.rb:11:in `block in resolved_build_setting_value'
```