add Mixmax Link Preview

[mimmi20]

Fixes #1833.

[codecov]

Codecov Report

Merging #1847 into master will increase coverage by <.01%.
The diff coverage is 50%.

@@             Coverage Diff              @@
##             master    #1847      +/-   ##
============================================
+ Coverage     49.15%   49.15%   +<.01%     
  Complexity      758      758              
============================================
  Files          1642     1642              
  Lines         59780    59784       +4     
  Branches      26704    26704              
============================================
+ Hits          29387    29389       +2     
- Misses        30393    30395       +2

Flag	Coverage Δ	Complexity Δ
#full	43.61% <50%> (ø)	0 <0> (ø)	⬇️
#lite	1.76% <0%> (-0.01%)	0 <0> (ø)
#standard	25.21% <50%> (ø)	0 <0> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
...ts/crawlers/general-crawlers/general-crawlers.json	55.28% <50%> (-0.03%)	0 <0> (ø)

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[garnold]

@mimmi20 @jaydiablo Thank you 👍