Update dev-dependencies

Author: wooorm

package.json

@@ -29,12 +29,12 @@
     "object-assign": "^4.1.0"
   },
   "devDependencies": {
-    "nyc": "^12.0.2",
+    "nyc": "^14.0.0",
     "prettier": "^1.14.2",
-    "remark-cli": "^5.0.0",
-    "remark-preset-wooorm": "^4.0.0",
-    "tape": "^4.2.0",
-    "xo": "^0.22.0"
+    "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",