[Request] Addon to blockreplace

[CypherPhyre]

Description of issue or feature request:
Could you add a y [min height] to go with the y [max height]?

Change this:
/cmi replaceblock id [blockName:data/id:data] w [blockName:data/id:data] r [range in chunks/g] y [max height]

To this:
/cmi replaceblock id [blockName:data/id:data] w [blockName:data/id:data] r [range in chunks/g] y [min height] y [max height]

It would be a big help when editing. Thanks.

**Cmi Version (using`/cmi version`):8.0.18.0

**Server Type (Spigot/Paperspigot/etc):Spigot

**Server Version (using `/ver`):1.13.1