fix(mongo): mis-order of eval and dump, $.literal

[Hieuzest]

support auto escaping for $-prefixed-string in nested typed object
fix $.literal when using with json output type

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.01%. Comparing base (e91dc93) to head (63c6513).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #120      +/-   ##
==========================================
+ Coverage   99.00%   99.01%   +0.01%     
==========================================
  Files          39       39              
  Lines       13638    13763     +125     
  Branches     3353     3374      +21     
==========================================
+ Hits        13502    13628     +126     
+ Misses        136      135       -1     

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