Fix Windows not being able to run jscodeshift (#4)

Fix Windows not being able to run `jscodeshift`

bin/rn-update-deprecated-modules

@@ -1,14 +1,17 @@
 #!/usr/bin/env node
 
-const { spawn } = require('child_process');
+const { execFileSync } = require('child_process');
 const commandExists = require('command-exists');
 
 if (!commandExists.sync('jscodeshift')) {
   return console.log('Please run `yarn global add jscodeshift` first.');
 }
 
-const codemod = spawn('jscodeshift', ['-t', __dirname + '/../src/codemod.js', ...process.argv.slice(2)]);
+const isPlatformWindows = process.platform === 'win32';
 
-codemod.stdout.on('data', data => console.log(data.toString()));
+execFileSync('jscodeshift', ['-t', __dirname + '/../src/codemod.js', ...process.argv.slice(2)], {
+  stdio: [process.stdin, process.stdout, process.stderr],
+  shell: isPlatformWindows,
+});
 
-codemod.on('close', () => require('../src/showPackagesToInstall'));
+require('../src/showPackagesToInstall');