Update dev-dependencies

Author: wooorm

package.json

@@ -31,13 +31,13 @@
     "es6-weak-map": "^2.0.1"
   },
   "devDependencies": {
-    "clone": "^2.1.1",
-    "nyc": "^12.0.2",
-    "prettier": "^1.14.2",
-    "remark-cli": "^5.0.0",
-    "remark-preset-wooorm": "^4.0.0",
-    "tape": "^4.0.2",
-    "xo": "^0.22.0"
+    "clone": "^2.0.0",
+    "nyc": "^14.0.0",
+    "prettier": "^1.0.0",
+    "remark-cli": "^6.0.0",
+    "remark-preset-wooorm": "^5.0.0",
+    "tape": "^4.0.0",
+    "xo": "^0.24.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier --write \"**/*.js\" && xo --fix",

readme.md

@@ -67,7 +67,7 @@ all of its nodes:
 *   `parent` — parent link (or `null` for the root node)
 *   `node` — link to the original node
 
-None of these properties are enumerable, and the original tree is _not changed_.
+None of these properties are enumerable, and the original tree is *not changed*.
 This means you can `JSON.stringify` the wrapped tree and it is just the same.
 
 `wrappedTree.children` returns array of wrapped child nodes, so that any