Types are missing the `ctx.request.params` property

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Current behavior

Using the following code in TypeScript results in an error:

import {Cottage} from 'cottage';
const router = new Cottage();
router.get('/:id', (ctx) => {
    return `Requested id: ${ctx.request.params.id}`; // Property 'params' does not exist on type 'Request'. ts(2339)
});

Expected behavior

The types correctly recognize the Request.params property.

Environment

Cottage v3.1.3 (npm latest)
TypeScript v3.9.6