update package

Signed-off-by: WaitSpring <me@waitspring.com>

package.json

@@ -11,12 +11,13 @@
 		"lint:styles": "stylelint \"**/*.{less,css}\""
 	},
 	"devDependencies": {
-		"eslint-config-wikimedia": "0.26.0",
+		"eslint-config-wikimedia": "latest",
 		"grunt": "1.6.1",
 		"grunt-banana-checker": "0.11.1",
 		"grunt-eslint": "24.3.0",
 		"grunt-stylelint": "0.19.0",
-		"stylelint-config-wikimedia": "0.16.1",
+		"stylelint": "^15.11.0",
+		"stylelint-config-wikimedia": "latest",
 		"svgo": "3.1.0"
 	}
 }