Fix bug "Request" is not defined

[muthurathinam]

Summary

Fixing Request not defined bug and updating dependency packages.

Motivation

1. Request is not defined in the node environment in such cases it better to verify before acting upon, so 2. have checked for the Request object presence and used.
   To be up to date with dependency list.

Test plan

npm test will ensure the code is stable

Closing issues

#189

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• All existing tests passed.