Update dev-dependencies

Author: wooorm

package.json

@@ -52,7 +52,7 @@
     "tape": "^5.0.0",
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
-    "xo": "^0.47.0"
+    "xo": "^0.49.0"
   },
   "scripts": {
     "build": "rimraf \"{index,test}.d.ts\" && tsc && type-coverage",
@@ -70,7 +70,10 @@
     "trailingComma": "none"
   },
   "xo": {
-    "prettier": true
+    "prettier": true,
+    "rules": {
+      "@typescript-eslint/ban-types": "off"
+    }
   },
   "remarkConfig": {
     "plugins": [