Documentation Changes upgrade: 完善升级文档 (#2403) (b4451df7) New Features slider: add formatMask property (aac56a86) interaction: use get method (78e2c32f) Bug Fixes 2365: 修复极坐标系圆弧坐标轴文本不响应坐标系 rotate 的问题 (#2424) (5c2bc3ff) 2371: 修复未判断 labels 为空导致的饼图图例过滤错误 (#2422) (a30eb71f) 2377: registerTheme 时，需要和基础主题进行合并 (#2416) (0c220765) 2412: 修复 axis title offset 设置不生效的问题，默认自动计算 (#2417) (a220df31) fix min/max value map to color (#2442) (b3d41214)
