ci: switch to Node.js 18 (#400)

Author: Addono

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [18.x]
 
     steps:
       - uses: actions/checkout@v2