[WIP] Allow changing to input element from textarea element when type is changed from "textarea"

[dhritzkiv]

Before this change, when the inputView's type changed from "textarea" to something else ("text", "number", etc.), the handleTypeChange method would not handle changing the textarea to an input, like it would for changing an input to a textarea.

This builds on #77, a non-breaking change. This change, however, is a breaking one, and should be released as a major version after the previous PR gets released as a patch.

The reason this is a breaking change is because previously, setting type to "textarea" was not needed to render as a textarea. If "textarea" was in the template then type could be anything and it would not matter: a textarea would still render.

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Todo:

• add tests
• version bump
• update documentation
• add release notes