Fix creating app with script (#1956)

* Added installing Cocoapods for MasOS to script

* Fixed installing cocoapods

* Moved checking that CocoaPods installed

* Fixed error with reactNativeVersion

* Removed old code

* Fixed error message

Author: alexChernyatiev

Examples/create-app.js

@@ -41,25 +41,24 @@ try {
     process.exit();
 }
 
+const appNameAndroid = `${appName}-android`;
+const appNameIOS = `${appName}-ios`;
+let owner = null;
+const reactNativeVersion = args[1] || `react-native@${execCommand('npm view react-native version')}`.trim();
+const reactNativeVersionIsLowerThanV049 = isReactNativeVersionLowerThan(49);
+const reactNativeCodePushVersion = args[2] || `react-native-code-push@${execCommand('npm view react-native-code-push version')}`.trim();
+
 if (!isReactNativeVersionLowerThan(60) && process.platform === "darwin") {
     try {
         console.log("Verify that CocoaPods installed");
         execCommand("pod --version");
         console.log("CocoaPods has installed");
     } catch {
-        console.error(`'CocoaPods' are required to run the script, you can install it with\n'sudo gem install cocoapods'\ncommand
-        `);
+        console.error(`'CocoaPods' are required to run the script, you can install it with\n'sudo gem install cocoapods'\ncommand`);
         process.exit();
     }
 }
 
-const appNameAndroid = `${appName}-android`;
-const appNameIOS = `${appName}-ios`;
-let owner = null;
-const reactNativeVersion = args[1] || `react-native@${execCommand('npm view react-native version')}`.trim();
-const reactNativeVersionIsLowerThanV049 = isReactNativeVersionLowerThan(49);
-const reactNativeCodePushVersion = args[2] || `react-native-code-push@${execCommand('npm view react-native-code-push version')}`.trim();
-
 console.log(`App name: ${appName}`);
 console.log(`React Native version: ${reactNativeVersion}`);
 console.log(`React Native Module for CodePush version: ${reactNativeCodePushVersion} \n`);