v0.19.0

Tool Improvements

• Improve diff performance by @egibs in #429
• Replace combined channel with slice by @egibs in #430

Rule Improvements

• Improve detection of Python attacks similar to 'yocolor' by @tstromberg in #427

Developer Improvements

• Use new samples repo for tests; keep data separate and update path references by @egibs in #431

Full Changelog: v0.18.2...v0.19.0