Latest xsimd 7.4.10 fails test `test_error_gamma` on MacOSX with XCode 12

[emmenlau]

The tests for xsimd run on a number of platforms successfully but fail with XCode 12 on MacOSX:

1: [ RUN      ] error_gamma_test/sse_double.gamma
1: /Users/bdaci01/xsimd/test/test_error_gamma.cpp:134: Failure
1: Expected equality of these values:
1:   diff
1:     Which is: 3
1:   0
1:   while testing lgamma (negative input)
1: [  FAILED  ] error_gamma_test/sse_double.gamma, where TypeParam = xsimd::batch<double, 2ul> (165 ms)

and

1: [ RUN      ] error_gamma_test/avx_double.gamma
1: /Users/bdaci01/xsimd/test/test_error_gamma.cpp:134: Failure
1: Expected equality of these values:
1:   diff
1:     Which is: 7
1:   0
1:   while testing lgamma (negative input)
1: [  FAILED  ] error_gamma_test/avx_double.gamma, where TypeParam = xsimd::batch<double, 4ul> (185 ms)