Update dependency koa-router to v8

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This PR contains the following updates:

Package	Type	Update	Change
koa-router	dependencies	major	^7.4.0 -> ^8.0.0

By merging this PR, the issue #10 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	7.5	CVE-2021-27516
Medium	6.5	CVE-2020-26291
Medium	6.1	CVE-2021-3647
Medium	6.1	CVE-2022-0868
Medium	6.1	CVE-2022-1233
Medium	6.1	CVE-2022-1243
Medium	5.3	CVE-2022-24723

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Release Notes

koajs/router (koa-router)

v8.0.6

Compare Source

• docs: moved "Call for Maintainers" to bottom" 1c08478
• Fix package name (#​41) 2e53c62

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

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⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: package-lock.json

No /opt/buildpack/tools/npm/6.14.18/bin defined - aborting