Run AppVeyor only on master and try* branches
Run AppVeyor only on master and try* branches

* To avoid duplicated PR builds

nobu/rubyspec,wied03/rubyspec,eregon/rubyspec,eregon/rubyspec,nobu/rubyspec,kachick/rubyspec,wied03/rubyspec,sgarciac/spec,ruby/rubyspec,nobu/rubyspec,kachick/rubyspec,ruby/spec,sgarciac/spec,ruby/spec,wied03/rubyspec,sgarciac/spec,ruby/rubyspec,eregon/rubyspec,ruby/spec,kachick/rubyspec