v0.20.0

Feature

• Adding a global option to trestle author headers. (#628) (16f0265)
• Repository APIs to allow developer a consistent interface to a trestle repo. (#583) (7bfabc5)

Fix

• Added test cases for Repository code (#625) (c3f8a33)
• Split catalog star, enable split of model with wildcard (#626) (d17389e)
• Tutorial tweaks (#623) (3ab018d)
• Add gfm support for mdformat (#620) (f67a74c)
• Ssp assemble prose, all extraction of general prose for responses (#618) (06e8627)
• Boost coverage fix split_too_fine (#615) (891227b)