Raise minimum Node.js version to v18

Author: domenic

.github/workflows/build.yml

@@ -12,17 +12,14 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 12
-          - 14
-          - 16
-        architecture:
-          - x64
+          - 18
+          - 20
+          - latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
-        architecture: ${{ matrix.architecture }}
     - run: yarn --frozen-lockfile
     - run: yarn lint
     - run: yarn test

package.json

@@ -25,6 +25,6 @@
     "mocha": "^9.1.1"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=18"
   }
 }