The issue was that `capture_by_value` was meant to be specialized
by plain type, e.g. `capture_by_value<std::weak_ordering>`, but
the TMP in Decomposer did not properly throw away `const` (and
`volatile`) qualifiers, before taking the value of `capture_by_value`.

This solves warning about the `uniform_fp_test_params` helper
being unused on M1 mac (or any other platform using GCC and not
using SSE2).

Closes #2845

Now we use intrinsics when possible, and fallback to optimized
implementation in portable C++. The difference is about 4x when
we can use intrinsics and about 2x when we cannot.

This should speed up our Lemire's algorithm implementation nicely.

The previously used `make_unsigned` approach combined with the overload
set of `extendedMult` caused compilation issues on MacOS platform. By
forcing the selection to be one of `std::uintX_t` types we don't need
to complicate the overload set further.

Previously it could be just plain reporter name, e.g. `xml`, but
it could not specify other reporter options. This change is not
particularly useful for the built-in reporters, as it mostly comes
in handy for combining specific custom reporter with custom arguments,
and the built-in reporters do not have those.

Signed-off-by: Cristian Le <cristian.le@mpsd.mpg.de>

This target previously did not specify its minimum C++ standard.
AppleClang was emitting warnings about the use of C++11 features
which is fixed by telling CMake that this target requires C++14.
Because this target does not link to the existing CMake targets
it never inherited that C++ standard requirement.

Catch2 has long since required a standard newer than C++98 so we
can safely ignore any warnings related to such old standards.