typo fix in README.md

[slayoo]

No description provided.

[codecov-io]

Codecov Report

Merging #871 (4311cb9) into master (bbe4efc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #871   +/-   ##
=======================================
  Coverage   64.50%   64.50%           
=======================================
  Files          20       20           
  Lines        1820     1820           
=======================================
  Hits         1174     1174           
  Misses        646      646           

Flag	Coverage Δ
unittests	64.50% <ø> (ø)

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[codecov-commenter]

Codecov Report

Merging #871 (4311cb9) into master (bbe4efc) will increase coverage by 3.77%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #871      +/-   ##
==========================================
+ Coverage   64.50%   68.28%   +3.77%     
==========================================
  Files          20       20              
  Lines        1820     2286     +466     
==========================================
+ Hits         1174     1561     +387     
- Misses        646      725      +79     

Flag	Coverage Δ
unittests	68.28% <ø> (+3.77%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pydates.jl	93.10% <0.00%> (-2.73%)	⬇️
src/gc.jl	100.00% <0.00%> (ø)
src/gui.jl	0.00% <0.00%> (ø)
src/serialize.jl	100.00% <0.00%> (ø)
src/pytype.jl	81.81% <0.00%> (+0.23%)	⬆️
src/pyclass.jl	96.72% <0.00%> (+0.42%)	⬆️
src/pyfncall.jl	97.36% <0.00%> (+0.49%)	⬆️
src/pyeval.jl	70.47% <0.00%> (+0.77%)	⬆️
src/pyinit.jl	83.67% <0.00%> (+0.87%)	⬆️
src/callback.jl	97.82% <0.00%> (+1.39%)	⬆️
... and 10 more

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