Fix Slackware build (#68)

src/wire/msgpack/base.h

@@ -29,6 +29,7 @@
 
 #include <cstdint>
 #include <string>
+#include <limits>
 #include <tuple>
 
 #include "byte_slice.h"

src/wire/msgpack/read.h

@@ -57,7 +57,7 @@ namespace wire
       else
         throw_logic_error();
     }
-    
+
     //! Skips next value. \throw wire::exception if invalid JSON syntax.
     void skip_value();