feat: 兼容舊版 .Net #320

Job	Run time
Detect	6s
Build Netcorext.Auth.API	1m 38s
Build Netcorext.Auth.Authentication	2m 3s
Build Netcorext.Auth.Authorization	1m 39s
Build Netcorext.Auth.Gateway	1m 56s
Build Netcorext.Auth.Protobufs	0s
Build Netcorext.Auth.Abstractions	0s
Build Netcorext.Auth.Extensions.AspNetCore	0s
Deploy Netcorext.Auth.Extensions.AspNetCore	0s
Deploy Netcorext.Auth.Abstractions	0s
Deploy Netcorext.Auth.Protobufs	0s
Tag Version	5s
	7m 27s

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