Upgrade route-recognizer to decode dyanmic path segments

[mfazekas]

See tildeio/route-recognizer#91

Right now if id contains a special character like / or : then we need to use a workaround like:

this.get('/posts/:id', (request, schema) {
    let decodedId = decodeURIComponent(request.params.id);
    return schema.posts.find(decodedId);
});

[mfazekas]

There might be a more appropriate location for the tests.

[samselikoff]

Thank you! ✨