21.0.0rc1 (September 21, 2021) ============================= A new release candidate of the upcoming 21.0.x series. Included are some vital bug fixes, a drastic decrease in Docker image size, and a change in the default output directory structure. * DOC: Add --index-metadata to `pybids layout` faq (#2546) * DOC: Add warning about slice timing correction in output documentation. (#2502) * ENH: Make bids the default output layout option (#2555) * ENH: Mask multi-echo data with reference mask instead of echo-specific masks (#2349) * FIX: Missing numpy import (#2533) * DOCKER: Shrink Docker image size (#2551) * DOCKER: Strip ABI tag from libQt5Core.so.5 to prevent Singularity failures (#2535) * MAINT: Run pytest through GitHub actions (#2529)