ci: make the test run only one os and using node 18

Author: chantouchsek

.github/workflows/ci.yml

@@ -14,8 +14,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node-version: [16]
-        os: [ubuntu-latest, macOS-latest]
+        node-version: [18]
+        os: [ubuntu-latest]
 
     steps:
       - uses: actions/checkout@v3.3.0