Add hook normalization & finally hook (#34897)

types/feathersjs__feathers/feathersjs__feathers-tests.ts

@@ -21,5 +21,15 @@ app.service('users').hooks({
             context.statusCode = 200;
             context.dispatch = { test: 'true' };
         }
+    },
+    after: [
+        (context: HookContext) => {
+            context.statusCode = 200;
+            context.dispatch = { test: 'true' };
+        }
+    ],
+    finally: (context: HookContext) => {
+        context.statusCode = 200;
+        context.dispatch = { test: 'true' };
     }
 });

types/feathersjs__feathers/index.d.ts

@@ -137,9 +137,10 @@ declare namespace feathers {
     }
 
     interface HooksObject {
-        before: Partial<HookMap>;
-        after: Partial<HookMap>;
-        error: Partial<HookMap>;
+        before: Partial<HookMap> | Hook | Hook[];
+        after: Partial<HookMap> | Hook | Hook[];
+        error: Partial<HookMap> | Hook | Hook[];
+        finally: Partial<HookMap> | Hook | Hook[];
     }
 
     // todo: figure out what to do: These methods don't actually need to be implemented, so they can be undefined at runtime. Yet making them optional gets cumbersome in strict mode.