chore: update strauss and composer deps

[justlevine]

What

Updates strauss config to store prefixed dependencies in vendor-prefixed. Also updated WPGraphQL Plugin Boilerplate to v0.0.8 to prevent conflicts when multiple AxeWP plugins are installed.

Why

How

Testing Instructions

Additional Info

Checklist:

• [x] My code is tested to the best of my abilities.
• [x] My code follows the WordPress Coding Standards.
• [x] My code has proper inline documentation.
• [x] I have added unit tests to verify the code works as intended.
• [x] I included the relevant changes in CHANGELOG.md

[coveralls]

Coverage: 61.939%. Remained the same when pulling 6bffe63a66be015d60d2e91aae7ce7f1b09190d4 on justlevine:chore-update-strauss into a650377b97e9ba32f4bfab054fd2293d57efeb63 on AxeWP:develop.