Rework dependency check to throw errors

rich-iannone / DiagrammeR

Graph and network visualization using tabular data in R

https://rich-iannone.github.io/DiagrammeR/

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Closed erikvona closed 1 year ago

erikvona commented 1 year ago

Reworked to throw errors if a dependency doesn't exist before skipping if the package doesn't exist.

Fixes #478

rich-iannone commented 1 year ago

Really sorry this took eons to get to. Will merge right now!