fix compile error on MacOS M1 in encoding_operator.cpp:286.

[liuweiran900217]

I met a compile error when trying FastLanes on MacOS M1:

encoding_operator.cpp:286:17: error: no viable constructor or deduction guide for deduction of template arguments of 'VisitorFunctor'
        VisitorFunctor functor {this, &expr};

The way to fix this error is by setting VisitorFunctor<PT> functor {this, &expr}; on line 286 of encoding_operator.cpp. Hope this fix would help others to use FastLanes on MacOS.

[azimafroozeh]

Thanks for the PR, looks good!
The fuzzy test is failing because the seed needs to be bumped.
Please run make bump to increment the fuzz seed so CI can rerun the test with the updated value.

[liuweiran900217]

Thanks for your suggestion! I ran make dump and updated base_seed.