chore(deps): update dependency postcss-preset-env to v6.6.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
postcss-preset-env	devDependencies	minor	6.5.0 -> 6.6.0	source

---

Release Notes

csstools/postcss-preset-env

v6.6.0

Compare Source

• Moved browserslist detection from using each input file per process to using
  the working directory on intialization, as was implied by the documentation.
  If fixing this previously undocumented behavior causes any harm to existing
  projects, it can be easily rolled back in a subsequent patch. For the
  majority of projects — those with a singular browserslist configuration and
  potentially many individually processed CSS files — we should expect reported
  build times around 35 seconds to drop to less than 2 seconds.
• Updated browserslist to 4.4.2 (minor)
• Updated autoprefixer to 9.4.9 (patch)
• Updated caniuse-lite to 1.0.3000093 (patch)
• Updated postcss to 7.0.14 (patch)
• Updated postcss-attribute-case-insensitive to 4.0.1 (patch)

---

Renovate configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot. View repository job log here.