[Snyk] Security upgrade superagent from 7.1.5 to 9.0.0

[lance]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - package.json

⚠️ Warning

``` Failed to update the package-lock.json, please update manually before merging. ```

#### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **696/1000**
**Why?** Proof of Concept exploit, Has a fix available, CVSS 7.5 | Regular Expression Denial of Service (ReDoS)
[SNYK-JS-SEMVER-3247795](https://snyk.io/vuln/SNYK-JS-SEMVER-3247795) | Yes | Proof of Concept (*) Note that the real score may have changed since the PR was raised. Check the changes in this PR to ensure they won't cause issues with your project. ------------ **Note:** *You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.* For more information: 🧐 [View latest project report](https://app.snyk.io/org/cloudevents-js/project/3779a15c-1e26-4937-bae6-b5631c015bd9?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/cloudevents-js/project/3779a15c-1e26-4937-bae6-b5631c015bd9?utm_source=github&utm_medium=referral&page=fix-pr/settings) 📚 [Read more about Snyk's upgrade and patch logic](https://support.snyk.io/hc/en-us/articles/360003891078-Snyk-patches-to-fix-vulnerabilities) [//]: # (snyk:metadata:{"prId":"48777493-8fb9-4880-b22f-83fa6c377e96","prPublicId":"48777493-8fb9-4880-b22f-83fa6c377e96","dependencies":[{"name":"superagent","from":"7.1.5","to":"9.0.0"}],"packageManager":"npm","projectPublicId":"3779a15c-1e26-4937-bae6-b5631c015bd9","projectUrl":"https://app.snyk.io/org/cloudevents-js/project/3779a15c-1e26-4937-bae6-b5631c015bd9?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-JS-SEMVER-3247795"],"upgrade":["SNYK-JS-SEMVER-3247795"],"isBreakingChange":true,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","pr-warning-shown","priorityScore"],"priorityScoreList":[696],"remediationStrategy":"vuln"}) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Regular Expression Denial of Service (ReDoS)](https://learn.snyk.io/lesson/redos/?loc=fix-pr)

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