Bug: NotFound handler was called although route exists

[sknr]

📄 What has changed

There was a bug in the _findRoute method of the file node.go. Please see the adjusted test TestMethodNotAllowed in router_test.go as an example.

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[sknr]

Hi @vmihailenco, is this project still actively maintained? If yes, it would be nice if someone could have a look at my PR.