🆕 Enhancements
- New chart type - Slope Chart
![basic-slope-chart](https://private-user-images.githubusercontent.com/17950663/329965035-48a2ed23-4806-4fc6-b52d-f1dcc4032c61.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.nF3iFENHrxIP1OChqfWQ8aiyt1CUWQCI9WwKokgQuEM)
🐞 Bug fixes
- Fix issue #4216: grid padding calculation to support array of stroke widths, thanks @veryinsanee
- Fix heatmap yaxis offset #2033, thanks @cart-before-horse
- FIx types (yaxis.seriesName as an Array), thanks @j2ghz
- Remove redundant graphics.move() from end of lower rangeArea paths. - thanks @rosco54
- Fix #4386; pie chart size issue when given in percentage
- Fix #3827 - y-axis tooltip value in reversed
- Fix #4348 - dumbbell chart fix for timescale xaxis
- Fix #2251 - pie chart dataPointIndex when clicked
- Fix #4206 - datalabels in timeline chart
- Revert PR #4240