Apply suggestions from code review

packages/jest-config/package.json

@@ -43,7 +43,7 @@
     "jest-validate": "^27.3.1",
     "micromatch": "^4.0.4",
     "pretty-format": "^27.3.1",
-    "slash": "^4.0.0"
+    "slash": "^3.0.0"
   },
   "devDependencies": {
     "@types/babel__core": "^7.0.4",

packages/jest-config/src/resolveConfigPath.ts

@@ -8,7 +8,7 @@
 import * as path from 'path';
 import chalk = require('chalk');
 import * as fs from 'graceful-fs';
-import slashModule = require('slash');
+import slash = require('slash');
 import type {Config} from '@jest/types';
 import {
   JEST_CONFIG_BASE_NAME,
@@ -21,10 +21,6 @@ const isFile = (filePath: Config.Path) =>
 
 const getConfigFilename = (ext: string) => JEST_CONFIG_BASE_NAME + ext;
 
-// Fix incorrect TypeScript definition for `slash` package.
-const slash: typeof slashModule.default =
-  slashModule as unknown as typeof slashModule.default;
-
 export default (
   pathToResolve: Config.Path,
   cwd: Config.Path,

yarn.lock

@@ -12658,7 +12658,7 @@ fsevents@^1.2.7:
     micromatch: ^4.0.4
     pretty-format: ^27.3.1
     semver: ^7.3.5
-    slash: ^4.0.0
+    slash: ^3.0.0
     strip-ansi: ^6.0.0
     ts-node: ^9.0.0
     typescript: ^4.0.3
@@ -19642,13 +19642,6 @@ [email protected]:
   languageName: node
   linkType: hard
 
-"slash@npm:^4.0.0":
-  version: 4.0.0
-  resolution: "slash@npm:4.0.0"
-  checksum: 714b10473dd5efce5ebaad47c74d69201baf7715fa58e8049d3d2716d9da25a9571bfd3ecc50c3b7f4165948e2d8d5a1aa7faeaeca4891ee71a2fbd408268091
-  languageName: node
-  linkType: hard
-
 "slice-ansi@npm:^2.0.0":
   version: 2.1.0
   resolution: "slice-ansi@npm:2.1.0"