Update dev-dependencies

Author: wooorm

package.json

@@ -21,15 +21,17 @@
   "files": [
     "index.js"
   ],
-  "dependencies": {},
+  "dependencies": {
+    "eslint-plugin-ava": "^4.2.0"
+  },
   "devDependencies": {
     "browserify": "^14.0.0",
     "esmangle": "^1.0.0",
-    "nyc": "^10.0.0",
-    "remark-cli": "^2.1.0",
-    "remark-preset-wooorm": "^1.0.0",
+    "nyc": "^11.0.0",
+    "remark-cli": "^3.0.0",
+    "remark-preset-wooorm": "^3.0.0",
     "tape": "^4.4.0",
-    "xo": "^0.17.1"
+    "xo": "^0.18.2"
   },
   "scripts": {
     "build-md": "remark . --quiet --frail --output",
@@ -43,6 +45,7 @@
   },
   "xo": {
     "space": true,
+    "esnext": false,
     "ignore": [
       "mdast-util-to-string.js"
     ]
@@ -54,6 +57,8 @@
     "branches": 100
   },
   "remarkConfig": {
-    "presets": "wooorm"
+    "plugins": [
+      "preset-wooorm"
+    ]
   }
 }