chore: bump minimum Node.js version to 20

- Node 18 reached EOL in April 2025
- Update CI matrix to test Node 20 and 22 only
- Update documentation to reflect new requirement

Author: vnykmshr

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18, 20, 22]
+        node-version: [20, 22]
 
     steps:
       - uses: actions/checkout@v4

README.md

@@ -118,7 +118,7 @@ hash32('hello');
 
 ## Requirements
 
-Node.js 18+ or modern browsers (ES2020).
+Node.js 20+ or modern browsers (ES2020).
 
 ## License
 

docs/CHANGELOG.md

@@ -19,13 +19,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - **Flat API** - Use `hash32()`, `hash128()`, `hash128x64()` directly
 - **Zero dependencies** - Removed `debug` dependency
-- **Modern target** - Requires Node.js 18+
+- **Modern target** - Requires Node.js 20+
 
 ### Deprecated
 - **v3 API** - `v3.x86.hash32()` etc. still work but show deprecation warning
 
 ### Removed
-- **Node.js < 18 support** - Now requires Node.js 18+
+- **Node.js < 20 support** - Now requires Node.js 20+
 
 ## [1.0.0] - 2015-02-01
 

package.json

@@ -55,6 +55,6 @@
   },
   "homepage": "https://github.com/vnykmshr/murmur-hash#readme",
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=20.0.0"
   }
 }