New Feature - Amcharts 4.8.0

[kevzlou7979]

• [x] Annotation
• [x] Bullets
• [x] Force Directed
• [x] Data Grouping
• [x] Overlay Buster
• [x] Regression
• [x] SliceGrouper
• [x] Sunburst
• [x] TimeLine
• [x] WordCloud