Update dev-dependencies

Author: wooorm

package.json

@@ -11,22 +11,16 @@
     "Titus Wormer <[email protected]> (wooorm.com)"
   ],
   "devDependencies": {
-    "remark-cli": "^7.0.0",
-    "remark-preset-wooorm": "^6.0.0"
+    "remark-cli": "^8.0.0",
+    "remark-preset-wooorm": "^7.0.0"
   },
   "scripts": {
     "format": "remark . -qfo",
     "test": "npm run format"
   },
   "remarkConfig": {
     "plugins": [
-      "preset-wooorm",
-      [
-        "toc",
-        {
-          "heading": "contents"
-        }
-      ]
+      "preset-wooorm"
     ]
   }
 }

readme.md

@@ -2,7 +2,7 @@
 
 E**x**tensible **A**bstract **S**yntax **T**ree format.
 
-* * *
+***
 
 **xast** is a specification for representing [XML][] as an abstract
 [syntax tree][syntax-tree].