chore(textlint): update textlint-tester

Author: azu

package.json

@@ -39,7 +39,7 @@
     "babel": "^5.8.23",
     "mocha": "^2.3.3",
     "textlint": "^5.5.1-0",
-    "textlint-tester": "^0.5.0-0"
+    "textlint-tester": "^0.5.1-0"
   },
   "dependencies": {
     "analyze-desumasu-dearu": "^2.1.2",