refactor(packager): move the electron-packager dependency to forge instead of the users module

package.json

@@ -56,6 +56,7 @@
     "bluebird": "^3.4.6",
     "colors": "^1.1.2",
     "commander": "^2.9.0",
+    "electron-packager": "^8.3.0",
     "fs-promise": "^0.5.0",
     "inquirer": "^1.2.1",
     "log-symbols": "^1.0.2",

src/electron-forge-package.js

@@ -3,6 +3,7 @@ import asar from 'asar';
 import fs from 'fs-promise';
 import path from 'path';
 import pify from 'pify';
+import packager from 'electron-packager';
 import program from 'commander';
 import ora from 'ora';
 
@@ -44,7 +45,6 @@ const main = async () => {
   const arch = program.arch || process.arch;
   const platform = program.platform || process.platform;
 
-  const packager = require(path.resolve(dir, 'node_modules/electron-packager')); // eslint-disable-line
   const packageOpts = {
     asar: true,
     overwrite: true,

src/init/init-npm.js

@@ -6,7 +6,7 @@ import username from 'username';
 import installDepList from '../util/install-dependencies';
 
 const deps = [];
-const devDeps = ['babel-preset-stage-0', 'electron-packager'];
+const devDeps = ['babel-preset-stage-0'];
 const exactDevDeps = ['electron-prebuilt-compile'];
 const standardDeps = ['standard'];
 const airbnDeps = ['eslint', 'eslint-config-airbnb', 'eslint-plugin-import',