Drop support for Node.js v12 (#318)

* Drop support for Node.js v12

* Update test.yml

Author: ota-meshi

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node: [12, 14, 16]
+        node: [14, 16, 17, 18]
     steps:
       - name: Checkout
         uses: actions/checkout@v3

docs/started.md

@@ -11,7 +11,7 @@ npm install --save-dev eslint @intlify/eslint-plugin-vue-i18n
 ::: tip Requirements
 
 - ESLint v5.0.0 or later
-- Node.js v12.22.x, v14.17.x, v16.x or later
+- Node.js v14.17.x, v16.x or later
 
 :::
 

package.json

@@ -76,7 +76,7 @@
     "vuepress": "^1.8.2"
   },
   "engines": {
-    "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+    "node": "^14.17.0 || >=16.0.0"
   },
   "files": [
     "dist",