Make enif_protobuf work properly with proto3 defaulty fields

Author: Vagabond

rebar.config

@@ -53,6 +53,7 @@
 ]}.
 
 {gpb_opts, [
+    {introspect_proto_defs_version, 2},
     {i, "src"},
     {o_erl, "src/pb"},
     {o_hrl, "src/pb"},

src/peerbook/libp2p_peer.erl

@@ -454,5 +454,5 @@ encode_map(Map) ->
                          end, [], Map)).
 
 load_pb_msg_defs() ->
-    ok = enif_protobuf:load_cache(libp2p_peer_pb:get_msg_defs()),
+    ok = enif_protobuf:load_cache(libp2p_peer_pb:get_proto_defs()),
     enif_protobuf:set_opts([{string_as_list, true}]).