fix: accept-version on default route

[climba03003]

Fixes #3625

I think as a fast solution and not falling into the version constraint check in find-my-way. We can use a symbol to temporary store the header and revert it after find-my-way pick up the route.

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[github-actions]

Node: 12
PR: [1] 1117k requests in 30.06s, 209 MB read
MAIN: [1] 1171k requests in 30.09s, 219 MB read

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Node: 14
PR: [1] 1002k requests in 30.06s, 187 MB read
MAIN: [1] 1065k requests in 30.07s, 199 MB read

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Node: 16
PR: [1] 1102k requests in 30.07s, 206 MB read
MAIN: [1] 1102k requests in 30.06s, 206 MB read

[mcollina]

lgtm

[github-actions]

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