Optional Trace Logging

This release introduces a new dynamic var, log-traces. When enabled, each track call will log its trace message (at level TRACE) before executing its body; this can result in very verbose logging output, but is often useful when tracking down behavior errors that do not directly result in thrown exceptions.

Improve efficiency

This release marginally improves the efficiency of the code used to track the trace and exceptions. It also updates some other dependencies.

Initial Release

Split the code out of io.aviso/twixt and made some minor refactorings.