fix: install pods only on mac

Author: satya164

src/create.ts

@@ -69,6 +69,7 @@ export default async function create(argv: yargs.Arguments<any>) {
       type: 'input',
       name: 'description',
       message: 'What is the description for the package?',
+      validate: input => Boolean(input),
     },
     {
       type: 'input',

templates/library/$package.json

@@ -20,7 +20,8 @@
     "prepare": "bob build",
     "release": "release-it",
     "example": "yarn --cwd example",
-    "bootstrap": "yarn example && yarn && cd example/ios && pod install"
+    "pods": "cd example/ios && node -e \"process.exit(require('os').platform() === 'darwin')\" || pod install",
+    "bootstrap": "yarn example && yarn && yarn pods"
   },
   "keywords": [
     "react-native",