Fix current ctx._matchedRoute

[mdenisov]

Fixes #34

[falkenhawk]

Thanks! It'd be lovely to have it secured by a test or two. Maybe https://github.com/ZijianHe/koa-router/blob/c0e9e088cd679f3c4030b73d8c0fc7b69e1ffecb/test/matched.test.js#L64-L98 ? (it'd need to be ported from ava to mocha though, just a general idea...)

[mdenisov]

@falkenhawk done! added tests for new logic.

[niftylettuce]

@koa/router v9.1.0 released to npm and mirrored to koa-router as well

https://github.com/koajs/router/releases/tag/v9.1.0

[BainDragneel]

Thx!