Drop support for Node <v12, v13, and v15 (#247)

* Drop support for Node <v12, v13, and v15

* add .node-version

Author: ota-meshi

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - name: Install
         run: yarn install
       - name: Lint
@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node: [10, 12, 14, 16]
+        node: [12, 14, 16]
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.node-version

@@ -0,0 +1 @@
+16

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 v10.13.0 or later
+- Node.js v12.22.x, v14.17.x, v16.x or later
 
 :::
 

package.json

@@ -74,7 +74,7 @@
     "vuepress": "^1.5.2"
   },
   "engines": {
-    "node": ">=10.13.0 || >=12.0.0 || >= 14.0.0"
+    "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
   },
   "files": [
     "dist",