fix(npm): update peerDependencies: "textlint": ">= 5.5.0"

Author: azu

package.json

@@ -53,6 +53,6 @@
     "textlint-rule-prh": "^2.4.0"
   },
   "peerDependencies": {
-    "textlint": ">= 5.5.0"
+    "textlint": ">= 5.6.0"
   }
 }