feat(plugins/pagerduty): add ClientApiDependencies type

* have ClientApiConfig join ClientApiDependencies with custom
  configuration

Signed-off-by: Alec Jacobs <cajacobs5401@gmail.com>

plugins/pagerduty/src/api/types.ts

@@ -81,12 +81,15 @@ export type OnCallsResponse = {
   oncalls: OnCall[];
 };
 
-export type ClientApiConfig = {
-  eventsBaseUrl?: string;
+export type ClientApiDependencies = {
   discoveryApi: DiscoveryApi;
   fetchApi: FetchApi;
 };
 
+export type ClientApiConfig = ClientApiDependencies & {
+  eventsBaseUrl?: string;
+};
+
 export type RequestOptions = {
   method: string;
   headers: HeadersInit;