Text Expander is not compatible with React 19

[mattcosta7]

React 19 introduced a heuristic based handling for custom elements where it attempts to set a property instead of an attribute if a scalar value is passed to an attribute, where the element has that same property defined on its prototype

TextExpander element has a get keys() on it's prototype, but not set keys(value) {} operation. this creates a situation where react tries to element.keys = ..... which fails because no setter is defined.

We should define a setter to help make this compat. I imagine this same issue would exist using preact or other, similar, vdom implementations

the error:

TypeError: Cannot set property keys of #<TextExpanderElement> which has only a getter