chore: upgrade protobuf to 0.3.2 (#4368)

Co-authored-by: leonnyu <leonnyu@tencent.com>

apisix/plugins/grpc-transcode/proto.lua

@@ -43,7 +43,12 @@ local function create_proto_obj(proto_id)
     end
 
     local _p  = protoc.new()
-    local res = _p:load(content)
+    -- the loaded proto won't appears in _p.loaded without a file name after lua-protobuf=0.3.2,
+    -- which means _p.loaded after _p:load(content) is always empty, so we can pass a fake file
+    -- name to keep the code below unchanged, or we can create our own load function with returning
+    -- the loaded DescriptorProto table additionally, see more details in
+    -- https://github.com/apache/apisix/pull/4368
+    local res = _p:load(content, "filename for loaded")
 
     if not res or not _p.loaded then
         return nil, "failed to load proto content"

rockspec/apisix-master-0.rockspec

@@ -45,7 +45,7 @@ dependencies = {
     "lua-resty-session = 2.24",
     "opentracing-openresty = 0.1",
     "lua-resty-radixtree = 2.8.0",
-    "lua-protobuf = 0.3.1",
+    "lua-protobuf = 0.3.2",
     "lua-resty-openidc = 1.7.2-1",
     "luafilesystem = 1.7.0-2",
     "lua-tinyyaml = 1.0",