4.0.0

What's Changed

• PHP8 updates by @dcarbone in #2

Full Changelog: 3.0.1...4.0.0

Small bugfix

Typecasting return value of "CurlPlusResponse::__toString" to string prior to returning.

3.0.0: Simplification

- Bumped PHP version requirement to 5.4+
- Removed old Response namespace and associated classes
- Added new "CurlPlusResponse" class for all responses
- Removed "CurlPlusClientState" class.  The states are now constants on the "CurlPlusClient" class itself
- Added dependency "dcarbone/curl-header-extractor" to facilitate header/body separation from responses
- Minor documentation and test updates to reflect changes
- Removed Autoloader
- Removed all Interfaces.  This lib is simple enough.

2.1.1

Updating source URL for test case as old one seems to be down...

1.0.2

Fixing issue that caused multi-part response headers to be parsed imp…