Refactoring: determine keyComparator at construction time

[mincong-h]

For map-like deserializer, determine keyComparator at construction time instead of resolution time (ResolvableDeserializer#resolve). It allows us to have a deterministic key-comparator during the entire lifecycle of a deserializer.

-    Comparator<Object> keyComparator;
+    final Comparator<Object> keyComparator;

[codecov-commenter]

Codecov Report

Merging #161 into master will decrease coverage by 0.01%. The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #161      +/-   ##
============================================
- Coverage     93.26%   93.24%   -0.02%     
  Complexity      339      339              
============================================
  Files            47       47              
  Lines           787      785       -2     
  Branches        173      172       -1     
============================================
- Hits            734      732       -2     
  Misses           24       24              
  Partials         29       29              

Impacted Files	Coverage Δ	Complexity Δ
.../jackson/datatype/deserialize/MapDeserializer.java	100.00% <100.00%> (ø)	9.00 <2.00> (ø)
...kson/datatype/deserialize/MaplikeDeserializer.java	100.00% <100.00%> (ø)	10.00 <4.00> (ø)
...son/datatype/deserialize/MultimapDeserializer.java	100.00% <100.00%> (ø)	9.00 <2.00> (ø)

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[ruslansennov]

@mincong-h there is a issue to release this module, so please let me know when you finish all refactoring

[mincong-h]

@mincong-h there is a issue to release this module, so please let me know when you finish all refactoring

@ruslansennov I am all done with the refactoring and I don't plan to do more. You can release this module. Thank you for waiting me.