ci: use node 20 (#371)

Author: dargmuesli

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node: [14, 16, 17, 18]
+        node: [16, 18, 20]
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -52,8 +52,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        eslint: [5, 6, 7]
-        node: [14]
+        eslint: [5, 6, 7, 8]
+        node: [16]
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.node-version

@@ -1 +1 @@
-18
+20