chore(ci): update Node versions used in CI test (#6)

Author: fvsch

.github/workflows/main.yaml

@@ -1,21 +1,21 @@
 name: CI
+
 on:
-  - push
-  - pull_request
+  pull_request:
+  push:
+    branches: [main]
+
 jobs:
   test:
     name: Node.js ${{ matrix.node-version }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        node-version:
-          - 14
-          - 12
-          - 10
+        node-version: [20, 18]
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install