add wire version macro for 7.0

Author: kevinAlbs

src/libmongoc/src/mongoc/mongoc-client-private.h

@@ -102,6 +102,8 @@ BSON_BEGIN_DECLS
 #define WIRE_VERSION_5_1 14
 /* version corresponding to server 6.0 release */
 #define WIRE_VERSION_6_0 17
+/* version corresponding to server 7.0 release */
+#define WIRE_VERSION_7_0 21
 
 struct _mongoc_collection_t;
 

src/libmongoc/src/mongoc/mongoc-util.c

@@ -310,6 +310,8 @@ _mongoc_wire_version_to_server_version (int32_t version)
       return "5.3";
    case 17:
       return "6.0";
+   case 21:
+      return "7.0";
    default:
       return "Unknown";
    }