Adding dependabot.yml config file

[mdeshpande12]

This Pull Request consists of following changes:

1. Add config yml file for dependabot. This time, I did not add target-branch because our default branch is anyways flex-webchat-ui; so I don't think it would be necessary for us to include this line.

Contributing to Twilio

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• [x] I acknowledge that all my contributions will be made under the project's license.

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information