Fixup get_child_value status report

[awvwgk]

• also set boolean values correctly

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@970a489). Click here to learn what that means.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master      #21   +/-   ##
=========================================
  Coverage          ?   84.60%           
=========================================
  Files             ?       38           
  Lines             ?     2716           
  Branches          ?        0           
=========================================
  Hits              ?     2298           
  Misses            ?      418           
  Partials          ?        0           

Impacted Files	Coverage Δ
src/tomlf/build/table.f90	85.22% <100.00%> (ø)
test/json_de.f90	79.49% <100.00%> (ø)

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