Add Speedrank (#307)

- [x] Check the commit's or even all commits' message styles matches our requested structure.
- [x] Check your code additions will fail neither code linting checks nor unit test.

#### Short description of what this resolves:

[Speedrank](https://speedrank.app) monitors the performance of your website in the background. It displays Lighthouse reports in time and delivers recommendations for improvement. Speedrank is a paid product with 14-day-trial.

#### Proposed changes:

- Add Speedrank to the list of performance testing tools.

👍 Thank you!