[https-proxy-agent] Emit "proxyConnect" event on Agent

[TooTallNate]

Closes #153.

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🦋 Changeset detected

Latest commit: 2ba6340fee2f921259af59adf7ed422224a442d3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ----------------- | ----- | | https-proxy-agent | Minor |

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Name	Status	Preview	Updated (UTC)
proxy-agents	✅ Ready (Inspect)	Visit Preview	May 5, 2023 9:55pm