Update Catboy Api to Catboy

* Add Collective APIs Site in the Alternative sites

site: https://www.collective-api.ml

* Update Collective APIs link

Fungenerators Random Facts is now paid

It is not open-source, it is a paid service.

Mailgun only provides a testing tier. When this tier's limit runs out, you'll need to pay to keep using it.

ref: https://www.mailgun.com/pricing/
```
Try us out! Get 5,000 free emails per month for 3 months, then only pay for what you send

Pay As You Grow
```

Moved:
- ImprovMX
- mail.gw
- mail.tm
- MailboxValidator

Removed Wegmans (API no longer open to public)

The alternative site "collective API" is broken.

Removed Yahoo Weather (shutdown June 2021)

Improve description and change auth from No to apiKey

resolve #2975

Removed Picatic (acquired by Eventbrite) and updated Eventbrite link.

Updated CivicFeed to PeakMetrics (2019 name change)

Add Bob's Burgers API to Video

* Add Motivational Quotes API

Add Motivational Quotes API to Video

* Update README.md

Updated Quandl to Nasdaq Data Link (acquisition)

Removed Calendar Index to reflect 2018 acquisition by Calendarific. Calendar Index now redirects to Calendarific, and Calendarific is already listed separately, so Calendar Index has been removed.