sync with upstream

doc/src/pair_meam.rst

@@ -427,7 +427,7 @@ package. They are only enabled if LAMMPS was built with that package.
 See the :doc:`Build package <Build_package>` page for more info.
 
 The maximum number of elements, that can be read from the MEAM library
-file, is determined at compile time. The default is 5.  If you need
+file, is determined at compile time. The default is 8.  If you need
 support for more elements, you have to change the the constant 'maxelt'
 at the beginning of the file ``src/MEAM/meam.h`` and update/recompile
 LAMMPS.  There is no limit on the number of atoms types.

src/MEAM/meam.h

@@ -17,7 +17,7 @@
 #include <cmath>
 #include <string>
 
-constexpr int maxelt = 5;
+constexpr int maxelt = 8;
 
 namespace LAMMPS_NS {
 class Memory;