Create default-request-params.md

Author: k1rd3rf

.changeset/default-request-params.md

@@ -0,0 +1,9 @@
+---
+"swagger-typescript-api": patch
+---
+
+Add possibility to change default request params
+
+Useful when overriding the http client, and you want to make sure the request params are set.
+
+Can be set to `""` in order to not make it optional.