Version 0.21.0 released with the ability to specif...

# minutest

[dmcg]

Version 0.21.0 released with the ability to specify a fixture at the context top level as well as inside it. Should be entirely backwards compatible, but allows you to remove some boilerplate.
Also I've separated the builders from the runners internally, which should let us change one without the other, giving more chance of less API change