fix(deps): update kuromojin@2

Author: azu

package.json

@@ -33,15 +33,15 @@
   ],
   "description": "ら抜き言葉を検出するtextlint rule",
   "devDependencies": {
-    "husky": "^1.3.1",
-    "lint-staged": "^8.1.0",
+    "husky": "^4.2.5",
+    "lint-staged": "^10.2.11",
     "power-assert": "^1.4.1",
-    "prettier": "^1.15.3",
-    "textlint-scripts": "^2.1.0"
+    "prettier": "^2.0.5",
+    "textlint-scripts": "^3.0.0"
   },
   "dependencies": {
-    "kuromojin": "^1.2.1",
-    "textlint-rule-helper": "^1.1.4"
+    "kuromojin": "^2.0.0",
+    "textlint-rule-helper": "^2.1.1"
   },
   "prettier": {
     "singleQuote": false,

src/no-dropping-the-ra.js

@@ -1,7 +1,7 @@
 // LICENSE : MIT
 "use strict";
 import { RuleHelper } from "textlint-rule-helper";
-import kuromojin from "kuromojin";
+import { tokenize } from "kuromojin";
 
 function isTargetVerb(token) {
     return (
@@ -20,7 +20,7 @@ function isKoreru(token) {
     return token.pos == "動詞" && token.basic_form == "来れる";
 }
 
-module.exports = function(context) {
+module.exports = function (context) {
     const helper = new RuleHelper(context);
     const { Syntax, report, getSource, RuleError } = context;
     return {
@@ -29,7 +29,7 @@ module.exports = function(context) {
                 return;
             }
             const text = getSource(node);
-            return kuromojin(text).then(tokens => {
+            return tokenize(text).then(tokens => {
                 tokens.forEach(token => {
                     if (isKoreru(token)) {
                         report(