Moving types to peerDependencies and allowing express 5 (#309)

* Moving types to peerDependencies, allowing express 5.

* Testing on Node 22 as well.

* Readme: adjusting installation instructions.

* Ref: making those peers optional, only needed for those using TypeScript.

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x]
+        node-version: [16.x, 18.x, 20.x, 22.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:

README.md

@@ -14,12 +14,14 @@ This project is available as a
 
 ```bash
 $ npm install node-mocks-http --save-dev
+$ npm install @types/node @types/express --save-dev # when using TypeScript
 ```
 
 or
 
 ```bash
 $ yarn add node-mocks-http --dev
+$ yarn add @types/node @types/express --dev # when using TypeScript
 ```
 
 After installing the package include the following in your test files:

package.json

@@ -46,8 +46,6 @@
     "node": ">=14"
   },
   "dependencies": {
-    "@types/express": "^4.17.21",
-    "@types/node": "*",
     "accepts": "^1.3.7",
     "content-disposition": "^0.5.3",
     "depd": "^1.1.0",
@@ -59,6 +57,18 @@
     "range-parser": "^1.2.0",
     "type-is": "^1.6.18"
   },
+  "peerDependencies": {
+    "@types/express": "^4.17.21 || ^5.0.0",
+    "@types/node": "*"
+  },
+  "peerDependenciesMeta": {
+    "@types/express": {
+      "optional": true
+    },
+    "@types/node": {
+      "optional": true
+    }
+  },
   "devDependencies": {
     "@types/chai": "^4.3.11",
     "@types/mocha": "^10.0.6",