Reconcile the development, master, and main branches

[jrgriffiniii]

In compliance with samvera/maintenance#67, Samvera Community repositories should avoid the usage of branches named master.

Further, the standard practices for core components have been to ensure that main tracks the latest stable code contributions. For https://github.com/ActiveTriples/ActiveTriples, these are tracked on development, and as such, I have rebased the new main branch on this fork to track these changes.

Should this project become actively maintained by the Maintenance IG, perhaps deprecating the development branch entirely is possible? I have no strong opinions, but would propose that consistency may be best.