Fix issue2830（数值字符串末尾带有小数点0转换为整数出现NumberFormatException）

[Omega-Ariston]

#2830

[codecov-io]

Codecov Report

Merging #2838 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #2838      +/-   ##
============================================
- Coverage     80.48%   80.46%   -0.03%     
  Complexity     7180     7180              
============================================
  Files           145      145              
  Lines         26966    26969       +3     
  Branches       6450     6451       +1     
============================================
- Hits          21704    21701       -3     
- Misses         3400     3404       +4     
- Partials       1862     1864       +2

Impacted Files	Coverage Δ	Complexity Δ
...main/java/com/alibaba/fastjson/util/TypeUtils.java	80.23% <100%> (+0.03%)	631 <0> (+1)	⬆️
...com/alibaba/fastjson/serializer/SerialContext.java	72.91% <0%> (-4.17%)	19% <0%> (ø)
...ava/com/alibaba/fastjson/serializer/DateCodec.java	87.05% <0%> (-1.77%)	40% <0%> (-1%)
...main/java/com/alibaba/fastjson/util/FieldInfo.java	86.2% <0%> (-0.35%)	91% <0%> (ø)

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