zlib support (#9)

Reviewed-on: #9
Co-authored-by: Persson-dev <sim16.prib@gmail.com>
Co-committed-by: Persson-dev <sim16.prib@gmail.com>

include/sp/common/DataBuffer.h

@@ -166,7 +166,7 @@ class DataBuffer {
 			K newKey;
 			V newValue;
 			*this >> newKey >> newValue;
-			data.insert({newKey, newValue});
+			data.emplace(newKey, newValue);
 		}
 		return *this;
 	}

include/sp/common/VarInt.h

@@ -21,6 +21,8 @@ class VarInt {
 	std::uint64_t m_Value;
 
   public:
+	static const std::uint64_t MAX_VALUE = static_cast<std::uint64_t>(-1) >> 8;
+
 	VarInt() : m_Value(0) {}
 	/**
 	 * \brief Construct a variable integer from a value