[Snyk] Security upgrade mistune from 0.8.4 to 2.0.1

[aniketmaurya]

Changes

Fixes #148

Type of change

• Documentation Update
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codecov]

Codecov Report

Merging #150 (34da748) into master (6b32849) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #150   +/-   ##
=======================================
  Coverage   79.22%   79.22%           
=======================================
  Files          55       55           
  Lines        1516     1516           
=======================================
  Hits         1201     1201           
  Misses        315      315           

Flag	Coverage Δ
unittests	79.22% <ø> (ø)

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