update dependencies and devDependencies

Highlights:

* update array-to-sentence from v1 to v2
* introduce rollup-config-module to adapt to .mjs-based ecosystem
* update ESLint from v3 to v4
* introduce @shinnn/eslint-config and follow its coding rules, for example tab indent
* switch from istanbul to nyc

.editorconfig

@@ -3,10 +3,13 @@ root = true
 [*]
 charset = utf-8
 end_of_line = lf
-indent_style = space
-indent_size = 2
+indent_style = tab
+tab_width = 2
 insert_final_newline = true
 trim_trailing_whitespace = true
 
+[*.{md,yml}]
+indent_style = space
+
 [*.md]
 trim_trailing_whitespace = false

.gitignore

@@ -1,3 +1,3 @@
-bower_components
+.nyc_output
 coverage
 node_modules

.travis.yml

@@ -1,10 +1,5 @@
-git:
-  depth: 1
 branches:
   except: /^v\d/
 language: node_js
 node_js: node
-script: npm run-script pretest && npm run-script coverage
-after_script:
-  - npm install istanbul-coveralls
-  - node node_modules/.bin/istanbul-coveralls
+after_script: node_modules/.bin/nyc report --reporter=text-lcov | npx coveralls

index.js

@@ -1,15 +1,17 @@
+'use strict';
+
+var arrayToSentence = require('array-to-sentence');
+
 /*!
  * array-to-sentence-ja | ISC (c) Shinnosuke Watanabe
  * https://github.com/shinnn/array-to-sentence-ja
 */
-'use strict';
 
-var arrayToSentence = require('array-to-sentence');
-var objectAssign = require('object-assign');
-
-module.exports = function arrayToSentenceJa(arr, options) {
-  return arrayToSentence(arr, objectAssign({
-    separator: '、',
-    lastSeparator: 'および'
-  }, options));
-};
+function arrayToSentenceJa(arr, options) {
+	return arrayToSentence(arr, Object.assign({
+		separator: '、',
+		lastSeparator: 'および'
+	}, options));
+}
+
+module.exports = arrayToSentenceJa;

index.jsnext.js → index.mjs

@@ -5,8 +5,8 @@
 import arrayToSentence from 'array-to-sentence';
 
 export default function arrayToSentenceJa(arr, options) {
-  return arrayToSentence(arr, Object.assign({
-    separator: '、',
-    lastSeparator: 'および'
-  }, options));
+	return arrayToSentence(arr, Object.assign({
+		separator: '、',
+		lastSeparator: 'および'
+	}, options));
 }