reverted bump to npm version

.github/workflows/auto-test.yml

@@ -62,7 +62,7 @@ jobs:
         with:
           node-version: ${{ matrix.node }}
           check-latest: true
-      - run: npm install npm@10 -g
+      - run: npm install npm@9 -g
       - run: npm ci --production
 
   check-linters:

CONTRIBUTING.md

@@ -231,7 +231,7 @@ The goal is to make the Uptime Kuma installation as easy as installing a mobile
 ## Tools
 
 - [`Node.js`](https://nodejs.org/) >= 18
-- [`npm`](https://www.npmjs.com/) >= 10.2.4
+- [`npm`](https://www.npmjs.com/) >= 9.3
 - [`git`](https://git-scm.com/)
 - IDE that supports [`ESLint`](https://eslint.org/) and EditorConfig (I am using [`IntelliJ IDEA`](https://www.jetbrains.com/idea/))
 - A SQLite GUI tool (f.ex. [`SQLite Expert Personal`](https://www.sqliteexpert.com/download.html) or [`DBeaver Community`](https://dbeaver.io/download/))

README.md

@@ -57,13 +57,13 @@ Requirements:
   - ✅ Windows 10 (x64), Windows Server 2012 R2 (x64) or higher
   - ❌ Replit / Heroku
 - [Node.js](https://nodejs.org/en/download/) 18 / 20.4
-- [npm](https://docs.npmjs.com/cli/) 10
+- [npm](https://docs.npmjs.com/cli/) 9
 - [Git](https://git-scm.com/downloads)
 - [pm2](https://pm2.keymetrics.io/) - For running Uptime Kuma in the background
 
 ```bash
 # Update your npm
-npm install npm@10 -g
+npm install npm@9 -g
 
 git clone https://github.com/louislam/uptime-kuma.git
 cd uptime-kuma