Small windows compiling error

[Max9403]

This seems too simple to be worth a pull request but line 50 in fruit/impl/data_structures/semistatic_map.h

std::numeric_limits<NumBits>::max()
needs to be changed to
(std::numeric_limits<NumBits>::max)()

To fix a mix up with the max macro from a Window's header (extra info: https://stackoverflow.com/questions/27442885/syntax-error-with-stdnumeric-limitsmax)

[poletti-marco]

Hi, thanks for reporting!
I fixed this in 125c403.