Configure Flutter CI (#383)
Configure Flutter CI (#383)

* Configured Cirrus CI

As described in https://cirrus-ci.org/examples/#flutter

* Use Flutter 0.1.0

* always upgrade Flutter to the latest master

* removed pub cache to always to test against the latest version of libraries

* always use the latest available Flutter image

* no upgrade

flutter/plugins,flutter/plugins,mehmetf/plugins,tvolkert/plugins,tvolkert/plugins,flutter/plugins,tvolkert/plugins,flutter/plugins,flutter/plugins,flutter/plugins,mehmetf/plugins,mehmetf/plugins,tvolkert/plugins,mehmetf/plugins,mehmetf/plugins,flutter/plugins,flutter/plugins