Upgrade postcss-styl (#20)

Author: ota-meshi

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "eslint-plugin-vue-scoped-css",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "ESLint plugin for Scoped CSS in Vue.js",
   "main": "dist/index.js",
   "scripts": {
@@ -80,8 +80,8 @@
     "postcss-safe-parser": "^4.0.1",
     "postcss-scss": "^2.0.0",
     "postcss-selector-parser": "^6.0.2",
-    "postcss-styl": "^0.4.0",
-    "vue-eslint-parser": "^5.0.0 || ^6.0.0 || ^7.0.0"
+    "postcss-styl": "^0.5.0",
+    "vue-eslint-parser": "^7.0.0 || ^6.0.0 || ^5.0.0"
   },
   "peerDependencies": {
     "eslint": "^5.0.0 || ^6.0.0"