Uproot

Fixed 485 with PR 486.

Fixed 465, added support for RNTuple anchor (_only_) 471, finalized jagged array writing 481 and 482.

* PR 466, which fixes issue 465.
* PR 477 for writing jagged arrays to ROOT files (issue 354)
* PR 463, write-update.
* PR 457, docstring formatting.
* PR 450, compression libraries.

PR 449.

PR 442; platform-dependence on 32-bit Windows.

* PR 426: Enable getitem for TTree to recognize cycle number.
* PR 427: Allow compressing ROOT objects which have size greater than 2^24.
* PR 428: Get pytest-error-for-skips from PyPI.
* PR 430: Add support for writing multidimensional arrays to TTree branches.
* PR 432: Add handler for `map<string,string>` to streamed objects.
* PR 435: Allow dtypes with byteorders via lists. Fixes 434.
* PR 436: Instructions to set up a development environment.
* PR 437: Clear ChunkedSource cache on explicit close.
* PR 439: Add close method to ROOTDictionary. Fixes 438.