Added 2 new endpoints for WAF( Web Application Firewall)

[nl-ria]

Added 2 new endpoints from the WAF API.

1. Get WAFs: Lists all the WAFs associated with the service, given the service ID and the version.
2. Update WAF Rule Status by Tags: updates the status of the WAF rule(s) by Tags(s).

Added tests and checks.

[codecov]

Codecov Report

Merging #4 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #4   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines          24     38   +14     
=====================================
+ Hits           24     38   +14

Impacted Files	Coverage Δ
src/config.js	100% <ø> (ø)	⬆️
src/index.js	100% <100%> (ø)	⬆️

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[philippschulte]

Hi Nikita,

Sorry for the delay in getting back to you! Thanks for contributing to the project! I think we also need to update the README file. I haven't played with the WAF endpoints yet. Therefore, please give me some time to test your changes. I'll get back to you as soon as I have an update.

Thanks,
Philipp