Add customizable height

[will0149]

the widget persist with the same height and i cannot change it, and for width and height use double values please.

[pmatatias]

The concept of width here uses character length. that's why it uses int .
for height you can adjust the vertical padding of the decoration.

in the current version, there is no height parameter yet. but I will try to develop an improvement to add adjustable height and width parameters.

However, you are very welcome to open a PR for this feature.