fix: call onChange only if formattedDate has changed

[prsdthkr]

Description

Currently this.props.onChange is called from multiple places without checking if the formattedDate in the state has truly changed. This leads to this.props.onChange being called with the same payload multiple times. To prevent this we should explicitly check if formattedDate has changed before calling this.props.onChange with the new payload.

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[jacobdevera]

Not to say this change is wrong, but I'm having a hard time reproducing it. I've been logging, setting breakpoints, etc. but any onChange function I set or any of the related functions (updateDate, resetState, validateDates) only seem to be called once whether I'm typing in dates or selecting a date with the calendar.

[prsdthkr]

Not to say this change is wrong, but I'm having a hard time reproducing it. I've been logging, setting breakpoints, etc. but any onChange function I set or any of the related functions (updateDate, resetState, validateDates) only seem to be called once whether I'm typing in dates or selecting a date with the calendar.

Oops! forgot to add before/after GIF. Added.

For example, onChange is fired after onBlur with the same data, or even after selecting the same date again.

[jacobdevera]

Okay, I can see those cases, that makes sense to prevent.