- change simple array of feeds to array of feed => feed-settings (idea from mysportsfeeds-node wrapper)
- retrofit new array format to all API versions
- update BaseApi methods to process new array format
- subclasses of BaseApi don't need to override __determineUrl() anymore
- updated __determineUrl() avoids duplication of feed names
- feed list for each API version updated as best I can to match online API Documentation

- new module only needs the v2.1 validFeeds array, in new refactored format
- feed list taken from online API Documentation for v2.1 as best I can

Convenient for testing/debugging

…tead of "..." token.

We convert the ellipsis ... token format to key/value array everywhere parameters are needed anyway. Just do it once.

…r msg, not return 404 response.

Standardize verbose output with print() and E-O-L appropriate for running environment cli or web server.

- MySportsFeeds::buildVersion = '2.1.1' to show support for API v2.1
- remove unneeded "use" statements from MySportsFeeds
- update composer.json for required PHP version from 5.6 to 7.4.0
- update README.md with proposed new Release number 2.1.1