Added a configurable number of batchers

[kristinapathak]

No description provided.

[codecov-io]

Codecov Report

Merging #18 into master will increase coverage by 0.06%.
The diff coverage is 72.72%.

@@            Coverage Diff             @@
##           master      #18      +/-   ##
==========================================
+ Coverage   57.97%   58.03%   +0.06%     
==========================================
  Files          15       15              
  Lines        1035     1039       +4     
==========================================
+ Hits          600      603       +3     
- Misses        433      434       +1     
  Partials        2        2

Impacted Files	Coverage Δ
batchInserter/batchInserter.go	91.95% <72.72%> (-0.82%)	⬇️

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