fix(template): use proper syntax for passing config command (#40)

Author: szymonrybczak

packages/plugin-platform-ios/src/template/ios/Podfile

@@ -15,7 +15,7 @@ if linkage != nil
 end
 
 target 'HelloWorld' do
-  config = use_native_modules!('rnef config -p ios')
+  config = use_native_modules!(['rnef', 'config', '-p', 'ios'])
 
   use_react_native!(
     :path => config[:reactNativePath],