Replace configstore with conf

Configstore store files in the home directory, which often have the wrong permissions for users and causes problems, like wulkano/Kap#351

lib/index.js

@@ -2,7 +2,7 @@
 const path = require('path');
 const childProcess = require('child_process');
 const osName = require('os-name');
-const Configstore = require('configstore');
+const Conf = require('conf');
 const chalk = require('chalk');
 const debounce = require('lodash.debounce');
 const inquirer = require('inquirer');
@@ -37,8 +37,11 @@ class Insight {
 		this.os = osName();
 		this.nodeVersion = process.version;
 		this.appVersion = this.packageVersion;
-		this.config = options.config || new Configstore(`insight-${this.packageName}`, {
-			clientId: options.clientId || Math.floor(Date.now() * Math.random())
+		this.config = options.config || new Conf({
+			configName: `insight-${this.packageName}`,
+			defaults: {
+				clientId: options.clientId || Math.floor(Date.now() * Math.random())
+			}
 		});
 		this._queue = {};
 		this._permissionTimeout = 30;

package.json

@@ -32,7 +32,7 @@
 	"dependencies": {
 		"async": "^2.1.4",
 		"chalk": "^2.3.0",
-		"configstore": "^3.1.1",
+		"conf": "^1.3.1",
 		"inquirer": "^5.0.0",
 		"lodash.debounce": "^4.0.8",
 		"os-name": "^2.0.1",