Fix FingerUp causing UITouch to end in start location

[nsoojin]

@gabriellanata Hey buddy,

There is a a bug in fingerUp where the location in touchesEnded callback is the start position of the drag(e.g. fingerDown). It is because FingerInfo only holds the initial location of the finger, so when I call fingerUp, it will cause the final touch on the initial point, not where the drag has ended.

To reproduce, comment out this line and run the DragTests I put in.

Once again, I greatly appreciate this library you put together. It has opened up fantastic automated testing suites for my app.

[gabriellanata]

Thanks for catching this! We should probably throw some errors here if the identifier does not exist. Honestly we should probably add a bunch more sanity checks in the rest of the methods in this file. I can add those after your PR merges though.

[nsoojin]

hey @gabriellanata,
when are you planning to merge it and release a new version?

[gabriellanata]

hey @gabriellanata,

when are you planning to merge it and release a new version?

Yes sorry, had to fix CI

[gabriellanata]

#37