Upgrade dependencies

Author: sindresorhus

package.json

@@ -52,9 +52,9 @@
 		"debug": "^4.1.0",
 		"eslint": "^6.4.0",
 		"eslint-config-prettier": "^6.3.0",
-		"eslint-config-xo": "^0.26.0",
+		"eslint-config-xo": "^0.27.1",
 		"eslint-formatter-pretty": "^2.0.0",
-		"eslint-plugin-ava": "^8.0.0",
+		"eslint-plugin-ava": "^9.0.0",
 		"eslint-plugin-eslint-comments": "^3.0.1",
 		"eslint-plugin-import": "^2.18.2",
 		"eslint-plugin-no-use-extend-native": "^0.4.0",