Tests & Deps update

[etroynov]

• update deps;
• code clean ( remove unused vars form tests );
• add tests for Layer.params();

Checklist

• I have ensured my pull request is not behind the main or master branch of the original repository.
• I have rebased all commits where necessary so that reviewing this pull request can be done without having to merge it first.
• I have written a commit message that passes commitlint linting.
• I have ensured that my code changes pass linting tests.
• I have ensured that my code changes pass unit tests.
• I have described my pull request and the reasons for code changes along with context if necessary.

[etroynov]

@niftylettuce can you check my PR? Thx.

p.s sry for the direct message by reviewers for PR not available :(

[etroynov]

@3imed-jaberi @jmealo @dominicegginton can you review?

[SagnikPradhan]

I get your enthusiasm, but pinging random people is not helpful. Your PR won't get merged either way if none of the official contributors respond.

[etroynov]

@SagnikPradhan why random? I checked the previous PR and found these people gave approvals or merged PR

[3imed-jaberi]

LGTM

[titanism]

We have just published @koajs/router v11.0.0 which resolves this issue. This is mirrored to koa-router as well.

https://github.com/koajs/router/releases/tag/v11.0.0

This project is maintained by Forward Email and Lad.