added gzip encoding support for outgoing requests

[yesoreyeram]

Fixes #1003 and addressed #779

How to test

Before changes

• Select URL as source and paste https://infinity-demo.vercel.app/api/applications/billing/logs?startTime=${__from}&limit=10 as URL
• Run the query and you will see results
• Add a Accept-Encoding: gzip header manually
• You will see the following error

After changes

• Repeat the above steps
• Don't need to add Accept-Encoding: gzip header manually as it is getting added by default in the backend
• You will see the results as shown below. Also the query inspector will show you that the URL sent contain the Accept-Encoding header.