chore(test): remove power-assert

Author: azu

test/textlint-rule-preset-ja-technical-writing-test.js

@@ -1,6 +1,6 @@
 // LICENSE : MIT
 "use strict";
-const assert = require("power-assert");
+const assert = require("assert");
 const rules = require("../lib/textlint-rule-preset-ja-technical-writing").rules;
 const rulesConfig = require("../lib/textlint-rule-preset-ja-technical-writing").rulesConfig;
 describe("textlint-rule-preset-ja-technical-writing", function() {