Update min node version to 18.x.

Author: na9da

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x, 22.x]
+        node-version: [18.x, 20.x, 22.x]
 
     steps:
       - uses: actions/checkout@v2

package.json

@@ -16,7 +16,7 @@
   "description": "Geospatial catalog explorer based on TerriaJS.",
   "license": "Apache-2.0",
   "engines": {
-    "node": ">= 16.0.0"
+    "node": ">= 18.19.1"
   },
   "repository": {
     "type": "git",