feat: adding support for node 18 (#64)

Author: erunion

.github/workflows/ci.yml

@@ -7,7 +7,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x, 17.x]
+        node-version:
+          - 14
+          - 16
+          - 17
+          - 18
 
     steps:
       - uses: actions/checkout@v3