Use ignoring missingness to improve RL.jl type stability

[codecov-commenter]

Codecov Report

Merging #36 (4b56fe8) into main (1f2be9a) will increase coverage by 0.05%. The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
+ Coverage   69.34%   69.39%   +0.05%     
==========================================
  Files          13       13              
  Lines         561      562       +1     
==========================================
+ Hits          389      390       +1     
  Misses        172      172              

Impacted Files	Coverage Δ
src/traces.jl	84.33% <100.00%> (+0.09%)	:arrow_up:

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[jeremiahpslewis]

@HenriDeh what do you think?

[jeremiahpslewis]

Came up with something better, closing this.