Update CHANGES, version 0.12.1 [skip ci]
Update CHANGES, version 0.12.1 [skip ci]

oesteban/mriqc,oesteban/mriqc,poldracklab/mriqc,poldracklab/mriqc,poldracklab/mriqc,oesteban/mriqc,oesteban/mriqc,poldracklab/mriqc