bump version (#52)

Author: gucong3000

package.json

@@ -1,6 +1,6 @@
 {
   "name": "postcss-html",
-  "version": "0.23.2",
+  "version": "0.23.3",
   "description": "PostCSS syntax for parsing HTML (and HTML-like)",
   "repository": {
     "type": "git",
@@ -43,7 +43,7 @@
   },
   "peerDependencies": {
     "postcss": ">=5.0.0",
-    "postcss-syntax": ">=0.3.0"
+    "postcss-syntax": "^0.6.0"
   },
   "devDependencies": {
     "autoprefixer": "^8.3.0",
@@ -54,7 +54,7 @@
     "postcss": "^6.0.21",
     "postcss-less": "^1.1.5",
     "postcss-scss": "^1.0.5",
-    "postcss-syntax": "^0.3.0",
+    "postcss-syntax": "^0.6.0",
     "sugarss": "^1.0.1"
   }
 }