Recuperar pruebas relacionadas a imágenes en rama v5.x

[lupomontero]

• https://github.com/Laboratoria/curriculum-parser/blob/941eab7e5ce9aa97f165f34c9f8253552c1a5dec/__tests__/course.spec.js#L133
• https://github.com/Laboratoria/curriculum-parser/blob/main/__tests__/course.spec.js#L144
• https://github.com/Laboratoria/curriculum-parser/blob/main/__tests__/course.spec.js#L176