Real good testing of Jasmine augmentation typing

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Author: dprevost-LMI

jasmine.d.ts

@@ -16,5 +16,5 @@ declare namespace jasmine {
      * We force Matchers to return a `Promise<void>` since under Jasmine's `expectAsync` everything is a promise.
      */
     // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    interface AsyncMatchers<T, U> extends ExpectWebdriverIO.CustomMatchers<Promise<void>, T> {}
+    interface AsyncMatchers<T, U> extends ExpectWebdriverIO.Matchers<Promise<void>, T> {}
 }

test-types/jasmine-global-expect-async/types-jasmine_async.test.ts

@@ -2,11 +2,16 @@
  * Custom matchers under the `ExpectWebdriverIO` namespace.
  * @see {@link https://webdriver.io/docs/custommatchers/#typescript-support}
  */
-declare namespace jasmine {
+declare namespace ExpectWebdriverIO {
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    interface Matchers<R, T> {
+        toBeCustom(): Promise<void>;
+    }
+}
 
+declare namespace jasmine {
     // eslint-disable-next-line @typescript-eslint/no-unused-vars
     interface AsyncMatchers<T, U> {
-        toBeCustom(): Promise<void>;
-        toBeCustomPromise: T extends ChainablePromiseElement ? (expected?: string | ExpectWebdriverIO.PartialMatcher<string> | Promise<ExpectWebdriverIO.PartialMatcher<string>>) => Promise<void> : never;
+        toBeCustomJasmine(): Promise<void>;
     }
 }