Add passing exhaustive-deps test for type parameters in TypeScript (#20432)

Author: eps1lon

packages/eslint-plugin-react-hooks/__tests__/ESLintRuleExhaustiveDeps-test.js

@@ -7774,6 +7774,16 @@ const testsTypescript = {
         }
       `,
     },
+    {
+      code: normalizeIndent`
+        function useMyThing<T>(): void {
+          useEffect(() => {
+            let foo: T;
+            console.log(foo);
+          }, []);
+        }
+      `,
+    },
   ],
   invalid: [
     {