chore(deps): update dependency cython to v0.29.6

[renovate]

This PR contains the following updates:

Package	Update	Change	References
cython	patch	==0.29.2 -> ==0.29.6	homepage

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[codecov]

Codecov Report

Merging #47 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #47   +/-   ##
======================================
  Coverage    86.2%   86.2%           
======================================
  Files           1       1           
  Lines         116     116           
======================================
  Hits          100     100           
  Misses         16      16

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