kpdecker/jsdiff is now v8 (upgrade from v7)

[jdalton]

Just FYI that https://github.com/kpdecker/jsdiff is now on v8. May be some goodness in the major bump.

[tmcdos]

Thank you, I will take a look in the upcoming days.

[tmcdos]

The only goodness I can see seems to be the bugfix #595
Anyway, I updated the version in package.json and rebuilt the code.