exhaustive-deps: Add passing test for generic type arguments

Author: eps1lon

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

@@ -1630,7 +1630,7 @@ const tests = {
                     }, 1000);
                     return () => clearInterval(id);
                   }, [setCount]);
-        
+
                   return <h1>{count}</h1>;
                 }
               `,
@@ -7704,6 +7704,15 @@ const testsTypescript = {
         }
       `,
     },
+    {
+      code: normalizeIndent`
+        function useMyThing<T>(): void {
+          useEffect(() => {
+            let foo: T;
+          }, []);
+        }
+      `,
+    },
   ],
   invalid: [
     {