v1.7.4

Changelog

bcbae0f Add multipleOf field to parser. (#1008)
9981d9f Auto parse external models when flag parseDependency is set (#1027)
0aac069 Fix link in Chinese introduction (#1005)
271d4d2 add parameter documentation for #1022 (#1023)
18b2bd1 allow multiple Swagger documents (#1022)
732ca2c clarify @accept ussage (#1025)
1a4da01 feat: add extensions for params (#789)
f9645be fix @x-tagGroups (#1010)
7ed539e release v1.7.4 (#1036)
9fb19d0 root level accept/produce params (#1011)
0548f60 text/plain allowed in request body (#1029)