v0.8.9

UnROOT v0.8.9

Diff since v0.8.8

Closed issues:

• feature: reading RooFitResult object (#162)
• [JOSS review] Contribution guidelines (#170)

Merged pull requests:

• JOSS Paper (#135) (@tamasgal)
• Add view of LazyTree (#140) (@Moelf)
• xrootd read support (#150) (@Moelf)
• add contribution guide (#172) (@Moelf)