build(npm): Files attr, publishes only index.js

- Added spaces as default formatting

.editorconfig

@@ -2,7 +2,7 @@
 root = true
 
 [*]
-indent_style = tab
+indent_style = space
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true

package.json

@@ -1,51 +1,54 @@
 {
-	"name": "hubot-rocketchat",
-	"version": "2.0.0-development",
-	"author": {
-		"name": "Rocket.Chat",
-		"url": "https://rocket.chat/"
-	},
-	"contributors": [
-		{
-			"name": "Sing Li",
-			"email": "sing.li@rocket.chat"
-		},
-		{
-			"name": "Gabriel Engel",
-			"email": "gabriel.engel@rocket.chat"
-		},
-		{
-			"name": "Aaron Ogle",
-			"email": "aaron.ogle@rocket.chat"
-		},
-		{
-			"name": "Tim Kinnane",
-			"email": "tim.kinnane@rocket.chat"
-		}
-	],
-	"description": "Hubot Rocket.Chat Adapter",
-	"keywords": [
-		"hubot",
-		"adapter",
-		"rocketchat",
-		"rocket",
-		"chat"
-	],
-	"license": "MIT",
-	"repository": {
-		"type": "git",
-		"url": "https://github.com/RocketChat/hubot-rocketchat.git"
-	},
-	"bugs": {
-		"url": "https://github.com/RocketChat/hubot-rocketchat/issues",
-		"email": "support@rocket.chat"
-	},
-	"main": "index.js",
-	"dependencies": {
-		"@rocket.chat/sdk": "^0.2.1",
-		"hubot": "3"
-	},
-	"peerDependencies": {
-		"hubot": "3"
-	}
+  "name": "hubot-rocketchat",
+  "version": "2.0.0-development",
+  "files": [
+    "index.js"
+  ],
+  "author": {
+    "name": "Rocket.Chat",
+    "url": "https://rocket.chat/"
+  },
+  "contributors": [
+    {
+      "name": "Sing Li",
+      "email": "sing.li@rocket.chat"
+    },
+    {
+      "name": "Gabriel Engel",
+      "email": "gabriel.engel@rocket.chat"
+    },
+    {
+      "name": "Aaron Ogle",
+      "email": "aaron.ogle@rocket.chat"
+    },
+    {
+      "name": "Tim Kinnane",
+      "email": "tim.kinnane@rocket.chat"
+    }
+  ],
+  "description": "Hubot Rocket.Chat Adapter",
+  "keywords": [
+    "hubot",
+    "adapter",
+    "rocketchat",
+    "rocket",
+    "chat"
+  ],
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/RocketChat/hubot-rocketchat.git"
+  },
+  "bugs": {
+    "url": "https://github.com/RocketChat/hubot-rocketchat/issues",
+    "email": "support@rocket.chat"
+  },
+  "main": "index.js",
+  "dependencies": {
+    "@rocket.chat/sdk": "^0.2.1",
+    "hubot": "3"
+  },
+  "peerDependencies": {
+    "hubot": "3"
+  }
 }