Fix: Ensure duplicateAndHydrate works with Fields using static closures

[fritz-c]

Nova's DateTime field (at least the one in Nova v5) uses a static anonymous function to define how to resolve the data to a string. This causes problems in the cloneField (and the dependent duplicateAndHydrate) method in your code, which binds a few of the field callbacks back to the newly cloned field instance. The specific error is:

Cannot bind an instance to a static closure

I initially implemented a fix using ReflectionFunction to detect if a function is static, but settled for a try-catch just in case reflection causes some sort of performance issue at low numbers.

[eslamabdallah74]

Nice job, this worked with me

[fritz-c]

@voidgraphics Sorry to bother you, but if you have some time, I'd appreciate if you could look this over. It's essentially a three-line code change (adding a try-catch for an otherwise unavoidable error), accompanied by a thorough new test case where nothing existed before.

[voidgraphics]

Thanks for the fix @fritz-c!

[fritz-c]

Thank you very much for reviewing and merging it.