default maxRetryAfter is not calculated correctly

[jolivaSan]

Describe the bug

• Node.js version: v12.20.0
• OS & version: macOS Mojave | 10.14.6

In got documentation sais

If maxRetryAfter is set to undefined, it will use options.timeout.

But is not working well in case of use extends

Actual behavior

Event if we use a timeout config like timeout: { request: 5000 }if don't provide a maxRetryAfter value when config is "normalized" the maxRetryAfter is being calculated as Infinity

Expected behavior

As per documentation maxRetryAfter should get 5000 as value.

Code to reproduce

const { describe, it } = require('mocha')
const { strictEqual } = require('assert').strict
const Got = require('got')

describe.only('default maxRetryAfter', function () {
  it('should get timeout value', async function () {
    const newGot = Got.extend({ timeout: { request: 5000 } })
    strictEqual(newGot.defaults.options.retry.maxRetryAfter, 5000)
  })
})

/**
      AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:

Infinity !== 5000

/*

I think the problem is because the code to calculate default value for maxRetryAfter is in the method normalizeArguments() and is calculating the default value before the options are merged, for this reason get timeout as undefined and the maxRetryAfter is getting infinity value

[szmarczak]

Weird. {timeout:5000, retry: {maxRetryAfter: undefined}} works as expected

[szmarczak]

https://runkit.com/szmarczak/604bbd2740bfe2001abf04a5