resolve #2951

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

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

Add Warrant API to Authentication & Authorization

Add Storj to storage APIs

Updated Quandl to Nasdaq Data Link

Updated Quandl to Nasdaq Data Link (acquisition)

Add EmojiHub API

Removed Calendar Index (acquired by Calendarific)

Changed cors for urlHaus to Yes

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.

Updated Validator.pizza to MailCheck.ai

Updated Validator.pizza to MailCheck.ai (name, url, and description) to match service's change from December 2nd 2021.

Updated CORS for trace moe anime API.

Cryptocurrency - 1inch api link leads to a 404, replaced with 'https://1inch.io/api/'

Change cors for cats API.

TheGraph requires an API key

Add Zoo Animals API