Update node version to 18 in CI

.github/workflows/release.yml

@@ -10,10 +10,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Use Node.js 16.x
+    - name: Use Node.js 18.x
       uses: actions/setup-node@v1
       with:
-        node-version: '16.x'
+        node-version: '18.x'
         registry-url: 'https://registry.npmjs.org'
     - name: Copy README
       run: |

.github/workflows/reviewdog.yml

@@ -9,10 +9,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@master
-    - name: Use Node.js 16.x
+    - name: Use Node.js 18.x
       uses: actions/setup-node@v1
       with:
-        node-version: '16.x'
+        node-version: '18.x'
         registry-url: 'https://registry.npmjs.org'
     - name: Install dependencies
       run: |

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 17.x]
+        node-version: [16.x, 18.x, 19.x]
 
     steps:
       - uses: actions/checkout@v2