Add option to pretty-print JSON text

[codecov[bot]]

Codecov Report

Merging #292 (edacd0b) into master (4e517d5) will increase coverage by 0.08%. The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #292      +/-   ##
==========================================
+ Coverage   78.26%   78.34%   +0.08%     
==========================================
  Files          43       43              
  Lines        3607     3459     -148     
==========================================
- Hits         2823     2710     -113     
+ Misses        784      749      -35     

Flag	Coverage Δ
unittests	78.34% <83.33%> (+0.08%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/serialization.jl	54.71% <83.33%> (+3.28%)	:arrow_up:
src/common.jl	66.66% <0.00%> (-33.34%)	:arrow_down:
src/utils/utils.jl	64.58% <0.00%> (-1.57%)	:arrow_down:
src/utils/print.jl	52.10% <0.00%> (-1.10%)	:arrow_down:
src/utils/generate_structs.jl	84.82% <0.00%> (-0.90%)	:arrow_down:
src/internal.jl	78.84% <0.00%> (-0.79%)	:arrow_down:
src/probabilistic.jl	77.19% <0.00%> (-0.78%)	:arrow_down:
src/scenarios.jl	83.67% <0.00%> (-0.65%)	:arrow_down:
src/deterministic.jl	81.53% <0.00%> (-0.56%)	:arrow_down:
src/utils/recorder_events.jl	91.39% <0.00%> (-0.53%)	:arrow_down:
... and 18 more