Ensure cached jet values are used also for `LorentzVectorBase` methods

[graeme-a-stewart]

As noted in #223 LorentzVectorBase.pt2(::PseudoJet) will not use the cached value in this type.

To prevent this inefficiency from happening, appropriate methods for ::EEJet and ::PseudoJet should be added in the LorentzVectorBase module.