chore: eslint for markdown (#2145)

Co-authored-by: 天泽 <linchengzhang@cai-inc.com>

.eslintrc

@@ -14,7 +14,8 @@
   "plugins": ["markdown"],
   "overrides": [
     {
-      "files": ["**/demo/**"],
+      "files": ["**/demo/*.md"],
+      "processor": "markdown/markdown",
       "rules": {
         "no-console": "off"
       }
@@ -33,6 +34,7 @@
     "vue/require-prop-types": "off",
     "vue/require-default-prop": "off",
     "vue/no-reserved-keys": "off",
+    "vue/comment-directive": "off",
     "vue/prop-name-casing": "off",
     "vue/max-attributes-per-line": [
       2,

package.json

@@ -103,7 +103,7 @@
         "eslint": "^6.8.0",
         "eslint-config-prettier": "^6.10.1",
         "eslint-plugin-html": "^6.0.0",
-        "eslint-plugin-markdown": "^1.0.2",
+        "eslint-plugin-markdown": "^2.0.0-alpha.0",
         "eslint-plugin-vue": "^6.2.2",
         "fetch-jsonp": "^1.1.3",
         "fs-extra": "^8.0.0",