update compat

[jake-w-liu]

update compat to higher version of JSON
avoid compilation error when using along with Gridap.jl

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.72%. Comparing base (40caf9c) to head (61bc2a4).
⚠️ Report is 18 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #515       +/-   ##
===========================================
+ Coverage   28.67%   50.72%   +22.04%     
===========================================
  Files           8        8               
  Lines         265      276       +11     
===========================================
+ Hits           76      140       +64     
+ Misses        189      136       -53     

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[jd-foster]

It's not clear that a simple update to JSON v1 automatically works?
See existing:
#513
#514

[BeastyBlacksmith]

I mean, this will have no effect until JuliaGizmos/WebIO.jl#518 is resolved. But I will reset the commit.