Make upload() fail if client & server schema versions are not in sync

[jwodder]

Closes #722.

[codecov]

Codecov Report

Merging #724 (5e6a9a1) into master (ee38041) will increase coverage by 0.06%.
The diff coverage is 96.66%.

@@            Coverage Diff             @@
##           master     #724      +/-   ##
==========================================
+ Coverage   84.06%   84.12%   +0.06%     
==========================================
  Files          59       59              
  Lines        5661     5689      +28     
==========================================
+ Hits         4759     4786      +27     
- Misses        902      903       +1     

Flag	Coverage Δ
unittests	84.12% <96.66%> (+0.06%)	⬆️

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Impacted Files	Coverage Δ
dandi/dandiapi.py	90.90% <90.90%> (-0.03%)	⬇️
dandi/exceptions.py	100.00% <100.00%> (ø)
dandi/tests/test_dandiapi.py	100.00% <100.00%> (ø)
dandi/upload.py	84.02% <100.00%> (+0.08%)	⬆️

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[yarikoptic]

minor changes request

[yarikoptic]

Thank you @jwodder!