FindLua: Add library name for Lua 5.3 on homebrew

Homebrew installs lua 5.3 like this:

    Cellar/lua53/5.3.2_2/lib/liblua.5.3.2.dylib
    Cellar/lua53/5.3.2_2/lib/liblua.5.3.dylib
    lib/liblua.5.3.2.dylib
    lib/liblua.5.3.dylib

Add the `liblua.{$VERSION}` naming scheme to our searched names.

Modules/FindLua.cmake

@@ -87,6 +87,7 @@ function(set_lua_version_vars)
              lua${CMAKE_MATCH_1}${CMAKE_MATCH_2}
              lua${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
              lua-${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
+             lua.${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
         )
     endforeach ()