fix: omit helperContainer prop from WrappedComponent

[joepvl]

The helperContainer prop needs to be included in the list of omitted props when spreading props onto WrappedComponent. Otherwise, passing a DOM element string to SortableContainer will cause React to complain about the prop. Example:

const SortableTBody = SortableContainer('tbody')

Using <SortableTBody/> will generate the following:

Warning: React does not recognize the `helperContainer` prop on a DOM element. [...]

Thanks for adding the helperContainer feature, it allowed me to simplify some of my code!

[clauderic]

Good catch, thanks for submitting this PR!

[clauderic]

Released in 1.5.3