COMPAT: add 0.19.2 msgpack/pickle files

[jreback]

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[codecov]

Codecov Report

Merging #15848 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #15848      +/-   ##
==========================================
- Coverage   90.97%   90.95%   -0.03%     
==========================================
  Files         143      143              
  Lines       49442    49442              
==========================================
- Hits        44982    44972      -10     
- Misses       4460     4470      +10

Flag	Coverage Δ
#multiple	88.71% <ø> (-0.01%)	⬇️
#single	40.69% <ø> (-0.11%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/core/common.py	90.96% <0%> (-0.34%)	⬇️
pandas/core/frame.py	97.56% <0%> (-0.1%)	⬇️

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