Update dev-dependencies

Author: wooorm

package.json

@@ -25,12 +25,12 @@
     "browserify": "^16.0.0",
     "nyc": "^14.0.0",
     "prettier": "^1.0.0",
-    "remark-cli": "^6.0.0",
-    "remark-preset-wooorm": "^5.0.0",
+    "remark-cli": "^7.0.0",
+    "remark-preset-wooorm": "^6.0.0",
     "tape": "^4.0.0",
     "tinyify": "^2.0.0",
-    "unist-builder": "^1.0.0",
-    "xo": "^0.24.0"
+    "unist-builder": "^2.0.0",
+    "xo": "^0.25.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier --write \"**/*.js\" && xo --fix",