\qtyrange (etc.) does not suppress leading "1" with |per-mode = symbol", leading \per and single units

[josephwright]

As reported in https://tex.stackexchange.com/questions/691877/shortcut-for-a-counts-per-time-unit-with-siunitx:

\documentclass{article}
\usepackage{siunitx}
\sisetup{range-units = single, per-mode = symbol}
\begin{document}

\qty{10}{\per\minute}

\qtyrange{60}{100}{\per\minute}.

\end{document}