Remove piping operators

[thibautjombart]

The code currently uses some piping operators %>%. I would recommend not using them in packages as they can make debugging quite hellish.

[joshwlambert]

There was some ambiguity before as to whether the opposition was specifically to %>%, and not |>, or whether the opposition was to using any pipes throughout the package. What are peoples preferences?

[thibautjombart]

Good point, I have never used the base pipe to be perfectly honest. Not sure how debugging goes with it.

[Bisaloo]

The native pipe should not be used here as it will introduce a dependency on more recent R versions, which our users might not have access to just yet.

[joshwlambert]

All pipes have now been removed from the package (as well as any dependency on an R version).