JSON: add support for default repeating values

[Alma-media]

No description provided.

[codecov-io]

Codecov Report

Merging #149 into master will increase coverage by 0.78%.
The diff coverage is 86.54%.

@@            Coverage Diff             @@
##           master     #149      +/-   ##
==========================================
+ Coverage   82.70%   83.48%   +0.78%     
==========================================
  Files         130      134       +4     
  Lines        5798     5784      -14     
==========================================
+ Hits         4795     4829      +34     
+ Misses        682      638      -44     
+ Partials      321      317       -4     

Impacted Files	Coverage Δ
pkg/codec/xml/xml.go	64.06% <0.00%> (ø)
pkg/codec/json/types.go	85.20% <60.00%> (-11.77%)	⬇️
pkg/codec/json/json.go	75.00% <75.00%> (+37.06%)	⬆️
pkg/codec/json/decode.go	84.21% <84.21%> (ø)
pkg/codec/json/enum.go	84.84% <84.84%> (ø)
pkg/codec/json/array.go	84.00% <90.90%> (+49.88%)	⬆️
pkg/codec/json/scalar.go	91.66% <91.66%> (ø)
pkg/codec/json/encode.go	100.00% <100.00%> (ø)
pkg/codec/json/errors.go	100.00% <100.00%> (ø)
pkg/codec/json/object.go	71.42% <100.00%> (-3.28%)	⬇️
... and 5 more

[jeroenrinzema]

I have included a temp fix to satisfy the linter by ignoring the gojay vendor directory. This ignore should be removed once the PR over at francoispqt/gojay has been merged (francoispqt/gojay#157)