pin flatbuffers to 0.8.4

[ritchie46]

Fix for #238

[jorgecarleitao]

Thanks a lot, @ritchie46 , for your fast response and fix 👍

Let's hope that this is temporary and flatbuffers addresses this on their side of things.

[codecov-commenter]

Codecov Report

Merging #239 (991de9d) into master (ed00e4d) will not change coverage.
The diff coverage is n/a.

❗ Current head 991de9d differs from pull request most recent head 8f1a465. Consider uploading reports for the commit 8f1a465 to get more accurate results

@@           Coverage Diff           @@
##           master     #239   +/-   ##
=======================================
  Coverage   82.49%   82.49%           
=======================================
  Files         162      162           
  Lines       43621    43621           
=======================================
  Hits        35983    35983           
  Misses       7638     7638           

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[alamb]

merging to get CI green

[ritchie46]

Thanks for the quick merge on this one!