mongoc bool

In libmongo.cr:18:103

 18 | alias MongocClientSessionWithTransactionCbT = (MongocClientSessionT, Void*, BsonT**, BsonErrorT* -> LibC::Bool)
                                                                                                          ^---------
Error: undefined constant LibC::Bool

In libbson.cr:62:116

 62 | fun append_array = bson_append_array(bson : BsonT*, key : LibC::Char*, key_length : LibC::Int, array : BsonT*) : LibC::Bool
                                                                                                                       ^---------
Error: undefined constant LibC::Bool