fix: float decoding, improve coverage

[tdakkota]

No description provided.

[codecov]

Codecov Report

Merging #25 (97d4e11) into main (451ba41) will increase coverage by 0.81%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##             main       #25      +/-   ##
===========================================
+ Coverage   99.18%   100.00%   +0.81%     
===========================================
  Files          29        33       +4     
  Lines        2214      2220       +6     
===========================================
+ Hits         2196      2220      +24     
+ Misses         15         0      -15     
+ Partials        3         0       -3     

Impacted Files	Coverage Δ
dec.go	100.00% <ø> (+2.16%)	⬆️
dec_int.go	100.00% <ø> (ø)
dec_bool.go	100.00% <100.00%> (ø)
dec_depth.go	100.00% <100.00%> (ø)
dec_float.go	100.00% <100.00%> (+1.10%)	⬆️
dec_null.go	100.00% <100.00%> (ø)
dec_read.go	100.00% <100.00%> (ø)
dec_skip.go	100.00% <100.00%> (+1.60%)	⬆️
dec_str.go	100.00% <100.00%> (+0.95%)	⬆️
... and 3 more

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