Add Codespell and update codecov

[skoudoro]

this PR add codespell to eliminates all the typo. (once less things to review!). Also, it updates codecov. The python package does not exist anymore.

[codecov[bot]]

Codecov Report

Merging #782 (b1528bf) into master (04e5158) will increase coverage by 41.93%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master     #782       +/-   ##
===========================================
+ Coverage   42.91%   84.85%   +41.93%     
===========================================
  Files          85       42       -43     
  Lines       20344    10080    -10264     
  Branches     2790     1366     -1424     
===========================================
- Hits         8731     8553      -178     
+ Misses      11246     1173    -10073     
+ Partials      367      354       -13     

Impacted Files	Coverage Δ
fury/actor.py	86.79% <ø> (+86.79%)	:arrow_up:
fury/actors/odf_slicer.py	76.10% <ø> (+76.10%)	:arrow_up:
fury/animation/animation.py	68.78% <ø> (+68.78%)	:arrow_up:
fury/colormap.py	93.26% <ø> (+93.26%)	:arrow_up:
fury/convert.py	80.00% <ø> (+80.00%)	:arrow_up:
fury/decorators.py	100.00% <ø> (+100.00%)	:arrow_up:
fury/deprecator.py	94.24% <ø> (+94.24%)	:arrow_up:
fury/gltf.py	80.36% <ø> (+80.36%)	:arrow_up:
fury/shaders/base.py	92.92% <ø> (+92.92%)	:arrow_up:
fury/stream/constants.py	100.00% <ø> (+100.00%)	:arrow_up:
... and 10 more

... and 64 files with indirect coverage changes