Add better support for gfm, directives, math, mdx

Author: wooorm

package.json

@@ -132,8 +132,10 @@
     "remark": "^15.0.0",
     "remark-cli": "^12.0.0",
     "remark-comment-config": "^8.0.0",
+    "remark-directive": "^3.0.0",
     "remark-gfm": "^4.0.0",
     "remark-github": "^12.0.0",
+    "remark-math": "^6.0.0",
     "remark-mdx": "^3.0.0",
     "remark-toc": "^9.0.0",
     "remark-validate-links": "^13.0.0",

packages/remark-lint-definition-case/index.js

@@ -51,6 +51,16 @@
  *   {"name": "not-ok.md", "label": "output"}
  *
  *   1:1-1:47: Do not use uppercase characters in definition labels
+ *
+ * @example
+ *   {"gfm": true, "label": "input", "name": "gfm.md"}
+ *
+ *   [^X]: Footnote definitions (from GFM) are checked too.
+ *
+ * @example
+ *   {"gfm": true, "label": "output", "name": "gfm.md"}
+ *
+ *   1:1-1:55: Do not use uppercase characters in definition labels
  */
 
 /**