Niworkflows

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A refactor of recently introduced spaces/references/spatial-references objects,
and some methods for upstream pipelines.

* ENH: Revision of spaces module for consistency (457)
* ENH: Add BIDS output version checker (456)
* ENH: Standard space querying (455)
* ENH: Add cache to ``SpatialReferences`` (453)
* ENH: Add helper function for cleaning a directory (454)
* FIX: Parsing of floats in ``ResampleImageBySpacing`` (452)

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Minor enhancements to better represent spaces/spatial-references,
and increasing the test coverage of the Reports System (with thanks to J. Kent
for the contribution):

* ENH: Separate ``Space`` and ``SpatialReferences`` (451)
* ENH+TST: Add all valid entities to the default report specification (447)

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A fix/enhancement of the report generation system. With thanks to J. Kent for
the contribution.

* ENH/FIX: parse orderings to account for missing entities (443)

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A bugfix release to support addressing `nipreps/sdcflows77
<https://github.com/nipreps/sdcflows/issues/77>`__.
With thanks to Alejandro De La Vega for contributions.

* FIX: ``IntraModalMerge`` failed for dims (x, y, z, 1) (441) oesteban
* ENH: Add ``n4_only`` workflow -- to skip brain extraction (435) adelavega
* MAINT: Update nibabel to 3.0.0rc1 (439) mgxd

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The first minor release of the niworkflows 1.x series. Numerous interfaces (GenerateCifti, CiftiNameSource, GiftiNameSource) have been changed to be compatible with HCP grayordinates.

* ENH: CIFTI / fsLR density (436) mgxd
* ENH: Expand GenerateCifti & MedialNaNs interfaces to support HCP grayordinates / fsLR surfaces (417) mgxd

1.0.x series
============