This adds support for
1. custom delimiters
2. reading offsets to avoid having to read a large CSV all at once
3. excluding byte-order-mark
NODE-861
#7443
* ⚡️test setup
* ⚡️fix 'testData' implicitly has an 'any' type.
* ✅ test github action file binary data reading
* ✅ checking for output binary equality
* ✅ writing files to different formats
* ✅ reading spreadsheet with different options
* ⚡️improve workflow file path replacement
* 🐛 fixing string.at() not supported in node 14.
* 🐛 trying to fix github action test error
* ⚡ fix for empty binary
* ⚡ switch for binary test
* ⚡️test helpers now return/compare json and binary (if not empty))
* ⚡ removed commented console log
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Co-authored-by: Michael Kret <michael.k@radency.com>
