Merge isLong() and isInteger()

[lmartelli]

Summary

JSON does not distinguish between long and int types. So in my opinion, it makes no sense to assert on those specific types. Same goes for isDouble() : isDecimal would make more sense.

But it would be a breaking change, so I guess the best is to use satisfies() with a custom condition.

[ashleyfrieze]

@lmartelli - I think we can potentially add some more expressive conditions to the NumberNodeDsl - perhaps using Jackson's own node type checking functions. At the moment, all it's doing is asserting the numeric type that Jackson decided to store as the value within the numeric node object.

Perhaps any other users might like to make their opinion heard on this?