fix jsdom undefined nodeType for attributes

[chiptus]

I added a quickfix for cases where nodeType is undefined. it will check that the objects has the same constructor - meaning the same Class.

fix #22

It has changes in all files because I applied prettier on the files.

[coveralls]

Coverage increased (+0.5%) to 92.308% when pulling bce38dd on chiptus:master into ac6eb6f on Olegas:master.

[coveralls]

Coverage increased (+0.5%) to 92.308% when pulling 63d8ded on chiptus:master into ac6eb6f on Olegas:master.

[Olegas]

@chiptus Let's remove last commit there are code style changes are made. It is not clean where is the main changes are.

[chiptus]

reverted the changes and made the hotfix without style changes.

[coveralls]

Coverage decreased (-1.1%) to 90.65% when pulling 3d86a79 on chiptus:master into 4fbf204 on Olegas:master.

[coveralls]

Coverage decreased (-1.1%) to 90.65% when pulling 3d86a79 on chiptus:master into 4fbf204 on Olegas:master.

[Olegas]

I don't think this fix is sufficient. What about this line: https://github.com/Olegas/dom-compare/blob/master/lib/compare.js#L104 ?

Here we need to know the correct node type to select proper comparison strategy.