detect-clang: add a check for clang-12
It's still in develepment, so this may have to change down the road,
but for now it works.
* anything we can detect. */
#if defined(__clang__) && !defined(SIMDE_DETECT_CLANG_VERSION)
-# if __has_warning("-Wimplicit-const-int-float-conversion")
+# if __has_warning("-Wformat-insufficient-args")
+# define SIMDE_DETECT_CLANG_VERSION 120000
+# elif __has_warning("-Wimplicit-const-int-float-conversion")
# define SIMDE_DETECT_CLANG_VERSION 110000
# elif __has_warning("-Wmisleading-indentation")
# define SIMDE_DETECT_CLANG_VERSION 100000
