cdefmt-v0.3.0

Full Changelog: cdefmt-v0.2.0...cdefmt-v0.3.0

cdefmt-v0.2.0

Two changes in this release:

• Support escaping opening braces
• Support adding format hints to parameters.

There's quite a bit of cleanup code to be done, and some missing features, like named parameters.

cdefmt-v0.1.0

updated readme and docs