Merge pull request #1 from ElderJames/master

适配NetStandard2.0

Author: xljiulang

WebApiClient/Internal/ProxyGenerator.cs

@@ -167,7 +167,11 @@ private static Type ImplementApiMethods(TypeBuilder typeBuilder, MethodInfo[] ap
                 }
                 apiMethodIL.Emit(OpCodes.Ret);
             }
+#if NETSTANDARD2_0
+            return typeBuilder.CreateTypeInfo();
+#else
             return typeBuilder.CreateType();
+#endif
         }
     }
 }