v0.4.0

What's Changed

• prepare release by @simonschaufi in #221
• [DOCS] Improve README by @simonschaufi in #222
• [TASK] Cleanup ECS config by @simonschaufi in #223
• [BUGFIX] Fix code style by @simonschaufi in #226
• [BUGFIX] Fix code style by @simonschaufi in #227
• [TASK] Rename FnMatchMatcher class by @simonschaufi in #228
• [FEATURE] Add Rule generator by @simonschaufi in #225
• prepare release by @simonschaufi in #229

Full Changelog: v0.3.0...v0.4.0