configury: use explicit conversions for Lua with implicit disabled.
configury: use explicit conversions for Lua with implicit disabled.

* m4/ax_lua.m4 (_AX_LUA_CHK_VER): We can be compatible with builds
of Lua that turn off implicit number->string coercions by calling
`tonumber` instead of relying on the coercion.

Signed-off-by: Gary V. Vaughan <f9023000f29773649f3850298becb9544b5fd6a9@gnu.org>

gvvaughan/slingshot