[Feature Request] Newman doesn't sync with postman cloud so mockserver tests fails

[praveendvd]

1. Newman Version (can be found via newman -v): 5.2.1
2. OS details (type, version, and architecture): windows 10
3. Are you using Newman as a library, or via the CLI? CLI
4. Did you encounter this recently, or has this bug always been there: Always there

Steps to reproduce the problem:

1. Create a mock server with response body as

{ "name" : "{{name}}"}

where name variable is in the environment , and its value is "user"

2. now in pre- requisite modify it as pm.enviroment.set("name", "new");
3. In postman desktop app the response from mock server will be { "name" : "new" }
4. But if we run the same using newman the output will be { "name" : "user"} as the changes made through pre-request will not be synced with mock server

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Expected behaviour:

1. the output should be same as modified variable value