Use path for platform independence

packages/monorepo-scripts/src/constants.ts

@@ -3,6 +3,6 @@ import * as path from 'path';
 export const constants = {
     monorepoRootPath: path.join(__dirname, '../../..'),
     stagingWebsite: 'http://staging-0xproject.s3-website-us-east-1.amazonaws.com',
-    lernaExecutable: './node_modules/lerna/bin/lerna.js',
+    lernaExecutable: path.join('node_modules', 'lerna', 'bin', 'lerna.js'),
     githubPersonalAccessToken: process.env.GITHUB_PERSONAL_ACCESS_TOKEN_0X_JS,
 };