maint: use MPIR for building manylinux wheels

The manylinux wheels built with GMP crashed with SIGILL when used on
another Linux machine even though they passed tests in CI. This commit
switches to using MPIR instead of GMP for the manylinux wheels because
those wheels appear to be more "portable" according to limited testing
so far.

Maybe there is a configure option that could be used with GMP to make it
more portable...

Author: oscarbenjamin

bin/cibw_before_build_linux.sh

@@ -2,5 +2,5 @@
 
 yum install -y xz
 bin/build_dependencies_unix.sh\
-  --gmp gmp\
+  --gmp mpir\
   --host x86_64-unknown-linux-gnu