Update dev-dependencies

Author: wooorm

package.json

@@ -48,7 +48,7 @@
   "devDependencies": {
     "@types/tape": "^4.0.0",
     "c8": "^7.0.0",
-    "mdast-util-from-markdown": "^1.0.0-beta.1",
+    "mdast-util-from-markdown": "^1.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",