Improve follow/follow_all

[MatthewZMSU]

Description

In this PR I have improved follow method of PuppeteerResponse class. Also I have added follow_all method in it. Updated documentation.

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update

How Has This Been Tested?

Tested it with several local spiders. They worked fine.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings