Scikit-hep-testdata

Added https://cburr.web.cern.ch/string-example.root to the set of files (daba9d14a30a74ce638ccbe4d055c41679335a71).

**Full Changelog**: https://github.com/scikit-hep/scikit-hep-testdata/compare/v0.4.38...v0.4.39

What's Changed
* docs: add ioanaif as a contributor for data by allcontributors in https://github.com/scikit-hep/scikit-hep-testdata/pull/139
* feat: add uproot-issue-951 data by ioanaif in https://github.com/scikit-hep/scikit-hep-testdata/pull/140


**Full Changelog**: https://github.com/scikit-hep/scikit-hep-testdata/compare/v0.4.37...v0.4.38

What's Changed
* feat: add uproot-issue-1070 data by ioanaif in https://github.com/scikit-hep/scikit-hep-testdata/pull/138


**Full Changelog**: https://github.com/scikit-hep/scikit-hep-testdata/compare/v0.4.36...v0.4.37

What's Changed
* feat: for scikit-hep/pylhe220 by APN-Pucky in https://github.com/scikit-hep/scikit-hep-testdata/pull/135


**Full Changelog**: https://github.com/scikit-hep/scikit-hep-testdata/compare/v0.4.35...v0.4.36

What's Changed
* feat: for scikit-hep/uproot51043 by jpivarski in https://github.com/scikit-hep/scikit-hep-testdata/pull/133


**Full Changelog**: https://github.com/scikit-hep/scikit-hep-testdata/compare/v0.4.34...v0.4.35

What's Changed
* feat: add uproot ntuple 6.29/01 files by ioanaif in https://github.com/scikit-hep/scikit-hep-testdata/pull/131


**Full Changelog**: https://github.com/scikit-hep/scikit-hep-testdata/compare/v0.4.33...v0.4.34