Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

This is a follow-up of #21104 .

An new option is introduced:

unboundedRange: Whether to treat the range as unbounded when range touches min or max.

• true:
  when range[0] <= min, the actual range becomes [-Infinity, range[1]];
  when range[1] >= max, the actual range becomes [range[0], Infinity].
  NOTE:
  - This provides a way to ensure all data can be considered in-range when min/max
  are not precisely known.
  - Default is true for backward compatibility.
  - Piecewise VisualMap does not need it, since it can define unbounded range in each piece,
  such as "< 12", ">= 300".
• false:
  Disable the unbounded range behavior.
  Use case: min/max reflect the normal data range, and some outlier data should always be
  treated as out of range.

Doc

apapche/echarts-doc commit: db69b8cef0d627a62f360757926e659022a4b483