fix(node): align behavior of it and test

nodejs/node#46889
https://nodejs.org/en/blog/release/v18.16.0
https://nodejs.org/en/blog/release/v19.8.0

Author: antongolub

types/node/test.d.ts

@@ -171,21 +171,21 @@ declare module 'node:test' {
      * The `it()` function is imported from the `node:test` module.
      * @since v18.6.0, v16.17.0
      */
-    function it(name?: string, options?: TestOptions, fn?: ItFn): void;
-    function it(name?: string, fn?: ItFn): void;
-    function it(options?: TestOptions, fn?: ItFn): void;
-    function it(fn?: ItFn): void;
+    function it(name?: string, options?: TestOptions, fn?: TestFn): void;
+    function it(name?: string, fn?: TestFn): void;
+    function it(options?: TestOptions, fn?: TestFn): void;
+    function it(fn?: TestFn): void;
     namespace it {
         // Shorthand for skipping a test, same as `it([name], { skip: true }[, fn])`.
-        function skip(name?: string, options?: TestOptions, fn?: ItFn): void;
-        function skip(name?: string, fn?: ItFn): void;
-        function skip(options?: TestOptions, fn?: ItFn): void;
-        function skip(fn?: ItFn): void;
+        function skip(name?: string, options?: TestOptions, fn?: TestFn): void;
+        function skip(name?: string, fn?: TestFn): void;
+        function skip(options?: TestOptions, fn?: TestFn): void;
+        function skip(fn?: TestFn): void;
         // Shorthand for marking a test as `TODO`, same as `it([name], { todo: true }[, fn])`.
-        function todo(name?: string, options?: TestOptions, fn?: ItFn): void;
-        function todo(name?: string, fn?: ItFn): void;
-        function todo(options?: TestOptions, fn?: ItFn): void;
-        function todo(fn?: ItFn): void;
+        function todo(name?: string, options?: TestOptions, fn?: TestFn): void;
+        function todo(name?: string, fn?: TestFn): void;
+        function todo(options?: TestOptions, fn?: TestFn): void;
+        function todo(fn?: TestFn): void;
     }
     /**
      * The type of a function under test. The first argument to this function is a
@@ -198,11 +198,6 @@ declare module 'node:test' {
      * If the test uses callbacks, the callback function is passed as an argument
      */
     type SuiteFn = (done: (result?: any) => void) => void;
-    /**
-     * The type of a function under test.
-     * If the test uses callbacks, the callback function is passed as an argument
-     */
-    type ItFn = (done: (result?: any) => void) => any;
     interface RunOptions {
         /**
          * If a number is provided, then that many files would run in parallel.

types/node/v18/test.d.ts

@@ -83,22 +83,22 @@ declare module 'node:test' {
      * @param fn The function under test. If the test uses callbacks, the callback function is
      *    passed as the second argument. Default: A no-op function.
      */
-    function it(name?: string, options?: TestOptions, fn?: ItFn): void;
-    function it(name?: string, fn?: ItFn): void;
-    function it(options?: TestOptions, fn?: ItFn): void;
-    function it(fn?: ItFn): void;
+    function it(name?: string, options?: TestOptions, fn?: TestFn): void;
+    function it(name?: string, fn?: TestFn): void;
+    function it(options?: TestOptions, fn?: TestFn): void;
+    function it(fn?: TestFn): void;
     namespace it {
         // Shorthand for skipping a test, same as `it([name], { skip: true }[, fn])`.
-        function skip(name?: string, options?: TestOptions, fn?: ItFn): void;
-        function skip(name?: string, fn?: ItFn): void;
-        function skip(options?: TestOptions, fn?: ItFn): void;
-        function skip(fn?: ItFn): void;
+        function skip(name?: string, options?: TestOptions, fn?: TestFn): void;
+        function skip(name?: string, fn?: TestFn): void;
+        function skip(options?: TestOptions, fn?: TestFn): void;
+        function skip(fn?: TestFn): void;
 
         // Shorthand for marking a test as `TODO`, same as `it([name], { todo: true }[, fn])`.
-        function todo(name?: string, options?: TestOptions, fn?: ItFn): void;
-        function todo(name?: string, fn?: ItFn): void;
-        function todo(options?: TestOptions, fn?: ItFn): void;
-        function todo(fn?: ItFn): void;
+        function todo(name?: string, options?: TestOptions, fn?: TestFn): void;
+        function todo(name?: string, fn?: TestFn): void;
+        function todo(options?: TestOptions, fn?: TestFn): void;
+        function todo(fn?: TestFn): void;
     }
 
     /**
@@ -114,12 +114,6 @@ declare module 'node:test' {
      */
     type SuiteFn = (done: (result?: any) => void) => void;
 
-    /**
-     * The type of a function under test.
-     * If the test uses callbacks, the callback function is passed as an argument
-     */
-    type ItFn = (done: (result?: any) => void) => any;
-
     interface RunOptions {
         /**
          * If a number is provided, then that many files would run in parallel.