Add RegistryBase schema and type

lib/entry-points.js

@@ -161989,6 +161989,12 @@ function credentialToStr(credential) {
   }
   return result;
 }
+var registryBaseSchema = {
+  /** The type of the package registry. */
+  type: string,
+  /** Whether the registry replaces the base registry for the ecosystem. */
+  "replaces-base": optional(boolean)
+};
 function getAddressString(address) {
   if (address.url === void 0) {
     return address.host;