add referenceProperty in the options parameter of getListDiff. referenceProperty will consider an object to be updated instead of added or deleted if one of its properties remains stable, such as its id. This option has no effect on other datatypes.
update dev dependencies
correct README.md grammar and update the documentation
referencePropertyin theoptionsparameter ofgetListDiff.referencePropertywill consider an object to be updated instead of added or deleted if one of its properties remains stable, such as itsid. This option has no effect on other datatypes.closes #14