[Snyk] Security upgrade @11ty/eleventy from 2.0.1 to 3.0.0

[kingcomma]

Snyk has created this PR to fix 2 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json
• package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Denial of Service (DoS) SNYK-JS-WS-7266574	696
	Missing Release of Resource after Effective Lifetime SNYK-JS-INFLIGHT-6095116	631

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🦉 Denial of Service (DoS)

[nateborr]

This change is a major-version upgrade of the Eleventy framework, to the just-released version 3.0.0, and will require manual updates.

The release notes recommend using Eleventy's Upgrade Help plugin.