fix(textarea): Use correct prop for minRows in autosized textarea

[malwilley]

react-textarea-autosize accepts minRows, not rows:

export interface TextareaAutosizeProps extends Omit<TextareaProps, 'style'> {
    maxRows?: number;
    minRows?: number;
    onHeightChange?: (height: number, meta: TextareaHeightChangeMeta) => void;
    cacheMeasurements?: boolean;
    style?: Style;
}

I'm noticing that TextArea doesn't have a story file?

Also, I tried adding snapshot tests for this component but I couldn't get the snapshots to render the autosizing correctly. I may be missing something, or this could be a gap with the snapshotting framework (cc @rbro112)