MNT: fix typos found by codespell

[DimitriPapadopoulos]

Also update versioneer to get rid of typos in this vendored code:

versioneer install --vendor

[effigies]

This wipes out our Docker-related versioneer hacks, but we made them obsolete a while back anyway.

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -22.96 ⚠️

Comparison is base (0f78fa2) 54.14% compared to head (7655373) 31.18%.

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Additional details and impacted files

@@             Coverage Diff             @@
##           master     #346       +/-   ##
===========================================
- Coverage   54.14%   31.18%   -22.96%     
===========================================
  Files          22       20        -2     
  Lines        1461     1456        -5     
  Branches      242      202       -40     
===========================================
- Hits          791      454      -337     
- Misses        614      987      +373     
+ Partials       56       15       -41     

Flag	Coverage Δ
ds054	?

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Impacted Files	Coverage Δ
smriprep/cli/run.py	2.81% <ø> (-71.37%)	⬇️
smriprep/workflows/surfaces.py	11.97% <ø> (ø)

... and 9 files with indirect coverage changes

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