Beta version with standalone SPM

To go with the release of AmyPET

spm12 v2.1.0 beta

• fix matlab.engine.EngineError (#19)
  • bump miutil.mlab dependency (AMYPAD/miutil#32)
• add spm_dir_eng (#18)
• replace pkg_resources => importlib.resources
• minor bug fixes
  • SPM normalisation: change vox size definition
  • fix matlab.double array bug
• misc code tidy & linting
  • replace black => yapf
  • fix badges (badges/shields#8671)
• misc build/test/CI framework updates (#19)
  • migrate setup.{cfg,py} => pyproject.toml
  • ignore matlab.engine PEP440 non-compliance (vis. pypa/setuptools#3772)
  • drop Python<=3.6 support
  • update workflows
  • update pre-commit tests

spm12 v2.0.0 beta

• fix & update centiloid (#17)
• add Py3.10, drop Py2.7 support
• misc framework updates

spm12 v1.1.0 beta

• add centiloid processing: regseg.seg_spm(), regseg.normw_spm() (#16)
• add utils.spm_dir()
• misc restructuring
• misc build framework updates

spm12 v1.0.6 beta

• replace brainweb => miutil for download & extraction (#12)

spm12 v1.0.5 beta

• update tests (#11)
  • fix tolerances
  • fix matlab not found
  • use fixtures
  • automate data download
• tests & build: misc framework updates (#11)
  • skip devel PRs
  • drop py3.5
  • fix py2.7

spm12 v1.0.4 beta

• update test framework (#10)
• add py3.9

spm12 v1.0.3 beta

• misc framework & test updates (#9)
• add pre-commit hooks
• minor build fixes

spm12 v1.0.2 beta

• use miutil.mlab.get_engine (#8)
• update documentation
• update build framework
  • add auto-versioning
  • update dependencies
  • add test coverage reporting

spm12 v1.0.1 alpha

• fix Windows installation