🐛 [BUG] 密度热力图 无法使用函数式设置color

[TopAlien]

🐛 Bug description [Please make everyone to understand it]

Please provide a link by forking these links G2Plot or GitHub repo, a minimal reproduction.

• Required Link to minimal reproduction: https://codesandbox.io/s/silly-water-7on9vt?file=/index.ts

📷 Step to reproduce

🏞 Expected result

🚑 Any additional [like screenshots]

• G2Plot Version:
• Platform:

[Mr-jili]

同样问题+1