fix(init): run package manager commands via cross-spawn

Allows dependencies with carets to be escaped properly on Windows.

package.json

@@ -104,6 +104,7 @@
     "bluebird": "^3.4.6",
     "colors": "^1.1.2",
     "commander": "^2.9.0",
+    "cross-spawn-promise": "^0.10.1",
     "debug": "^3.0.0",
     "electron-forge-template-angular2": "^1.0.3",
     "electron-forge-template-react": "^1.0.2",

src/util/yarn-or-npm.js

@@ -1,4 +1,4 @@
-import { spawnPromise } from 'spawn-rx';
+import crossSpawn from 'cross-spawn-promise';
 import logSymbols from 'log-symbols';
 import yarnOrNpm from 'yarn-or-npm';
 
@@ -18,6 +18,6 @@ const safeYarnOrNpm = () => {
 
 export default safeYarnOrNpm;
 
-export const yarnOrNpmSpawn = (...args) => spawnPromise(safeYarnOrNpm(), ...args);
+export const yarnOrNpmSpawn = (...args) => crossSpawn(safeYarnOrNpm(), ...args);
 
 export const hasYarn = () => safeYarnOrNpm() === 'yarn';

test/slow/install-dependencies_spec_slow.js

@@ -0,0 +1,21 @@
+import { expect } from 'chai';
+import fs from 'fs-extra';
+import os from 'os';
+import path from 'path';
+
+import installDeps from '../../src/util/install-dependencies';
+
+describe('install-dependencies', () => {
+  const installDir = path.resolve(os.tmpdir(), 'electron-forge-test-install-dependencies');
+
+  before(async () => { fs.ensureDir(installDir); });
+
+  it('should install the latest minor version when the dependency has a caret', async () => {
+    await installDeps(installDir, ['debug@^2.0.0']);
+
+    const packageJSON = require(path.resolve(installDir, 'node_modules', 'debug', 'package.json'));
+    expect(packageJSON.version).to.not.equal('2.0.0');
+  });
+
+  after(async () => await fs.remove(installDir));
+});