Move SPIR-V constants/limits to a separate header.
diff --git a/source/binary.cpp b/source/binary.cpp
index fb62a85..062eadd 100644
--- a/source/binary.cpp
+++ b/source/binary.cpp
@@ -38,6 +38,7 @@
 #include "libspirv/libspirv.h"
 #include "opcode.h"
 #include "operand.h"
+#include "spirv_constant.h"
 
 spv_result_t spvBinaryHeaderGet(const spv_const_binary binary,
                                 const spv_endianness_t endian,