Update dev-dependencies

Author: wooorm

lib/element.js

@@ -133,7 +133,7 @@ function attributeName(ctx, key) {
 
   if (
     name.slice(0, DATA.length) === DATA &&
-    /[0-9]/.test(name.charAt(DATA.length))
+    /\d/.test(name.charAt(DATA.length))
   ) {
     name = DATA + '-' + name.slice(4);
   }

package.json

@@ -32,16 +32,16 @@
     "xtend": "^4.0.1"
   },
   "devDependencies": {
-    "browserify": "^14.0.0",
+    "browserify": "^16.0.0",
     "bundle-collapser": "^1.2.1",
     "esmangle": "^1.0.1",
     "hastscript": "^3.0.0",
-    "nyc": "^11.0.0",
-    "remark-cli": "^4.0.0",
-    "remark-preset-wooorm": "^3.0.0",
+    "nyc": "^12.0.0",
+    "remark-cli": "^5.0.0",
+    "remark-preset-wooorm": "^4.0.0",
     "tape": "^4.0.0",
     "unist-builder": "^1.0.1",
-    "xo": "^0.18.0"
+    "xo": "^0.21.0"
   },
   "scripts": {
     "build-md": "remark . --quiet --frail --output",