21.0.1 (January 24, 2022) Bug-fix release in the 21.0.x series. This release re-enables reverse-PE EPI fieldmaps, i.e. EPIs acquired with the opposite phase-encoding direction to a BOLD series. Additionally, the ``--use-syn-sdc`` option will now error by default if no ``PhaseEncodingDirection`` can be found for a BOLD series. To reduce this to a warning, use ``--use-syn-sdc warn``. SyN-SDC will NOT be run, but the workflow will proceed. * FIX: Create single fmap_select_std node for use with all ANAT estimators (#2692) * FIX: Re-enable reverse-PE EPI fieldmaps (#2684) * FIX: Pass boolean use_syn_sdc to find_estimators (#2685) * FIX: Ensure AROMA inputs are uncompressed if --low-mem (#2657) * ENH: Add ``--topup-max-vols`` flag to control TOPUP runtime (#2688) * ENH: Allow ``--use-syn-sdc`` to take a "warn" option to avoid exiting when PE dir is unavailable (#2680) * RF: Add extension field to differentiate from upcoming templates (#2613) * WRAPPER: Map ``--bids-filter-file``\s into Docker container (#2691) * MNT: Silence warning from pybids; list packaging as dependency (#2689) * MNT: Add netbase to Docker image to ensure correct datalad operation (#2682) * MNT: Restore nitime to requirements, necessary for DVARS (#2678)