Drop Node 18

Node 18 was end-of-lifed in March 2025. Production cql-execution still works with it, but some of our dev/test libraries don't.

Author: cmoesel

.github/workflows/ci-workflow.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18.x, 22.x, 24.x]
+        node: [20.x, 22.x, 24.x]
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-node@v6

README.md

@@ -63,7 +63,7 @@ To use this project, you should perform the following steps:
 1. Install [Node.js](http://nodejs.org/) LTS<sup>*</sup>
 2. Execute the following from the root directory: `npm install`
 
-<sup>*</sup> This project is primarily developed and tested using Node 24.x, but all versions >= 18.x are expected to work. Since Node 18.x has reached end-of-life, developers should consider this project's support for Node 18.x to be _deprecated_.
+<sup>*</sup> This project is primarily developed and tested using Node 24.x, but all versions >= 20.x are expected to work. Since Node 18.x reached end-of-life over a year ago, this project no longer supports it.
 
 # To Execute Your CQL
 

examples/browser/package-lock.json

@@ -15,6 +15,6 @@
     "esbuild": "^0.28.1"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   }
 }

examples/browser/package.json

@@ -11,6 +11,6 @@
     "cql-execution": "file:../.."
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   }
 }

examples/node/package-lock.json

@@ -17,6 +17,6 @@
     "typescript": "^7.0.2"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   }
 }