Adds textProps prop for additional customization in ReactionIcon

[emibotti]

While adding the capability of restricting and allowing enlarging the font size in our app, we found out that the ReactionIcon component didn't have the option to receive props for its child Text (in our case allowFontSize or maxFontSizeMultiplier).

This is the use case:

<ReactionIcon
    ...
    textProps={{
      maxFontSizeMultiplier: MAX_FONT_SIZE_MULTIPLIER,
    }}
 />

with const MAX_FONT_SIZE_MULTIPLIER = 1.4:

[emibotti]

@vishalnarkhede Did you had a chance to check this?