Fix tests for introduction of Core.kwcall

[timholy]

This also resolves some issues with looking up bodyfunction names.

[codecov]

Codecov Report

Base: 84.08% // Head: 77.04% // Decreases project coverage by -7.04% ⚠️

Coverage data is based on head (afbcc69) compared to base (dcae62d).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #330      +/-   ##
==========================================
- Coverage   84.08%   77.04%   -7.05%     
==========================================
  Files          17       17              
  Lines        2162     2021     -141     
==========================================
- Hits         1818     1557     -261     
- Misses        344      464     +120     

Impacted Files	Coverage Δ
src/parcel_snoopi.jl	93.83% <ø> (-0.31%)	⬇️
src/invalidation_and_inference.jl	0.00% <0.00%> (-89.66%)	⬇️
src/invalidations.jl	63.90% <0.00%> (-13.90%)	⬇️
src/parcel_snoopi_deep.jl	86.32% <0.00%> (-3.58%)	⬇️
SnoopPrecompile/src/SnoopPrecompile.jl	85.71% <0.00%> (-1.79%)	⬇️
src/write.jl	90.90% <0.00%> (-1.40%)	⬇️
src/deep_demos.jl	57.89% <0.00%> (-1.08%)	⬇️
src/parcel_snoopl.jl	89.47% <0.00%> (-0.53%)	⬇️
src/visualizations.jl	0.00% <0.00%> (ø)
... and 2 more

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[timholy]

The failure in Stale will be fixed by #329.