3.3.0 -- Mon Mar 11 2024
=====================================================
- add an HTTP header: User-Agent

3.2.2 -- Mon Feb 26 2024
=====================================================
- add setProxy method

3.2.1 -- Fri Jan 26 2024
=====================================================
- add testing against PHP 8.3
- add PHPStan linting

3.2.0 -- Wed Jul 26 2023
=====================================================
- requires PHP >= 8.0, PHP 7.4 no longer supported 
- add testing against PHP 8.2

3.1.1 -- Wed Dec 22 2021
=====================================================
- add testing against PHP 8.1

3.1.0 -- Wed Sep 15 2021
=====================================================
- Error response when curl encounters a network issue (e.g. DNS, old TLS cipher). Before it
   would silently fail.
- Use test API keys in test suite for HTTP 200 and 402 responses

3.0.0 -- Thu Jan 28 2021
=====================================================
- deprecate PHP 5.6, added PHP 8

2.1.0 -- Thu May 9 2019
=====================================================
- file_get_contents printed errors and returned false. Instead those are
   caughed now and an empty valid JSON document with the error code is
   returned. file_get_contents is only used when the curl fetching doesn't
   work (rare)

2.0.3 -- Sat Apr 27 2019
=====================================================
- API returns HTTP 401 for invalid key
- add Vagrant setup for testing