This is kinda silly because either we're on the 'benchmarking' branch,
in which case the executable needs more dependencies, or we're not, in
which case we don't need anything beyond base

However, if we take tensort out then we need to specify base version
ranges, which seems like it opens the possibility for error if the base
version ranges need to be updated in the future

In the future I might add the other dependencies here that appear in the
'benchmarking' branch, but they're only there to draw the chart and I
don't want to add possible dependency issues for the package as a whole.
Folks using the 'benchmarking' branch are likely smart enough to figure
out to `cabal install` if something's not working