gh-115119: Recommend upstream libmpdec in build requirements (#136205)
(cherry picked from commit
b2e498ac26ba4720fa8a6a466aa8416ab69754d7)
Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
* Tcl/Tk 8.5.12 for the :mod:`tkinter` module.
+* `libmpdec <https://www.bytereef.org/mpdecimal/doc/libmpdec/>`_ 2.5.0
+ for the :mod:`decimal` module.
+
* Autoconf 2.71 and aclocal 1.16.5 are required to regenerate the
:file:`configure` script.