Create a wrapper to modify ctx.next

[SantosGuillamot]

This is part of the Server Extensibility feature. For full context please check out the final Implementation proposal.

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Create a wrapper to populate ctx.next so the middleware can work with the signature fn({ ctx, next }).

Luis has been reading the Koa's code and he thinks this simple wrapper should be enough:

const wrapper = (fn) => (ctx, next) => {
  ctx.next = next;
  return fn(ctx, next);
};

Dependencies:

Populate the middleware array with the correct packages.

Relevant code:

• Koa application: https://github.com/koajs/koa/blob/master/lib/application.js
• Koa compose: https://github.com/koajs/compose/blob/master/index.js

[SantosGuillamot]

I am marking this issue as blocked until the dependencies are finished.