Update readme.md to add Dependency and Vulnerability Status Badge

[YasharF]

Just a thought, do you rather have Snyke GitHub integration instead of this pull request? https://snyk.io/docs/github/#how-to-integrate-github-to-test-and-monitor-your-repositories

It looks like, that may let the project maintainers:

• get email alerts and a Snyk pull request with fixes when new vulnerabilities that affect a repo are disclosed