PHP support

• Support of PHP ^7.2 and ^8.0
• Dropped support of older PHP versions
• Fixed broken tests, PSR code standard

Fix class/file name conflict

0.2.7

Fix file anem error

http(s) headers support

Support for http and https connections with headers.

http(s) support

Support for http and https connections. wss is still used as default.

Regarding options in Connection::getClient

The options are now used in Connection::getClient.

New error codes

Handle more error codes from the API.

Added mock classes for testing

Merge pull request #11 from Textalk/mockclasses

Added mock classes for better testing.

Using stable dependencies

No dev- in dependencies.

Request header options

• Explicitly always using WebSocket connection.
• Adding possibility to set options for connection, like headers and timeout.
• Removed case-juggling in class name magic; use correct casing!

Better exception messages

Merge pull request #8 from Textalk/dev-exception-message

Better exception messages.