[feature] Add a middleware at a specified index
[fix] Correctly handle requests when a middleware passes an error to its callback
Merge pull request #203 from lpinca/add/middleware-at-index

Add a middleware at a specified index
Merge pull request #205 from lpinca/fix/middleware-error

Correctly handle requests when a middleware passes an error to its callback
[minor] Remove unused `querystring` and `noop` functions and fix a typo
[test] Refactor some integration tests
Merge pull request #206 from lpinca/refactor/integration-tests

Refactor some integration tests
[test] Improve test for timers cleanup #206