something is up with browserslist

[dsmmcken]

Running npx browserslist is supposed to output versions but it's only outputting safari and firefox

Chrome > 0 and last 0.5 years
Edge > 0 and last 0.5 years
Opera > 0 and last 0.5 years
Firefox > 0 and last 0.5 years
Safari > 0 and last 1 years
Firefox ESR and not dead

revesing the clauses in .browserlistsrc seems to fix it, join behaviour seems different in latest versions.

@bmingles noted we aren't depending on it directly and it is coming in as transitive property, so unknown which version is actually being run.