fixed panic when called Interface() for unexported field

[Code-Hex]

fixed

panic: reflect.Value.Interface: cannot return value obtained from unexported field or method [recovered]
        panic: reflect.Value.Interface: cannot return value obtained from unexported field or method

[codecov]

Codecov Report

Merging #14 (21abd9d) into main (71f91d9) will increase coverage by 2.61%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   91.76%   94.37%   +2.61%     
==========================================
  Files           7        7              
  Lines         583      587       +4     
==========================================
+ Hits          535      554      +19     
+ Misses         43       30      -13     
+ Partials        5        3       -2     

Impacted Files	Coverage Δ
dumper.go	93.85% <100.00%> (+1.37%)	⬆️
reflect.go	100.00% <100.00%> (ø)
internal/sort/sort.go	86.66% <0.00%> (+4.00%)	⬆️
dumpfunc_118.go	100.00% <0.00%> (+100.00%)	⬆️

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