test against Node.js v18 & v20

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        node: ['16', '18']
+        node: ['18', '20']
 
     steps:
       - uses: actions/checkout@v3

package-lock.json

@@ -22,6 +22,9 @@
         "react": "^18.2.0",
         "release-it": "^16.2.1"
       },
+      "engines": {
+        "node": ">=18"
+      },
       "peerDependencies": {
         "gatsby": "^4.0.0 || ^5.0.0",
         "react": ">=17.0.0",

package.json

@@ -46,5 +46,8 @@
   "repository": "github:kremalicious/gatsby-plugin-matomo",
   "bugs": {
     "url": "https://github.com/kremalicious/gatsby-plugin-matomo/issues"
+  },
+  "engines": {
+    "node": ">=18"
   }
 }