Set correct version and include changelog

Author: Makanz

changelog.md

@@ -0,0 +1,27 @@
+# Changelog 3.0.0
+
+### Breaking Changes
+- Updated to version 3.0.0-beta.1 with modular code structure
+
+### New Features
+- Added trendline offset setting (`trendoffset`)
+- Added two new example files (barChartWithNullValues.html, scatterProjection.html)
+
+### Bug Fixes
+- Fixed trendline accuracy and boundary calculations
+- Corrected trendline rendering, projection, and data accuracy
+- Fixed trendline data processing issues
+
+### Testing & CI
+- Added comprehensive unit tests for all components (trendline, label, drawing utils, lineFitter)
+- Added GitHub Actions workflow for automated testing on PRs and main branch
+- Updated Node.js version to 22 in CI
+
+### Code Quality
+- Split code into modular structure with separate components
+- Added Copilot instructions for development
+- Updated Chart.js dependency to version 4.4.9
+
+### Documentation
+- Updated README with new features
+- Added agent instructions for development workflow

dist/chartjs-plugin-trendline.min.js

@@ -1,6 +1,6 @@
 {
   "name": "chartjs-plugin-trendline",
-  "version": "3.0.0-beta.1",
+  "version": "3.0.0",
   "description": "Trendline for Chart.js",
   "main": "src/index.js",
   "scripts": {