Drop php 5.6
With this release, php less than 7.0 will be no longer supported.
Also the previous required package beberlei/assert is no longer a requirement. It was moved in to dev requirements as well as a suggested package to install.
With this release, php less than 7.0 will be no longer supported.
Also the previous required package beberlei/assert is no longer a requirement. It was moved in to dev requirements as well as a suggested package to install.