Support PHP 8

Merge pull request #30 from Codeception/php8

PHP 8 support

Documentation improvements

Improved documentation of haveHttpHeader and deleteHeader

Minor wording improvements.

Question: `deleteHeader()` can only delete headers that were set by `haveHttpHeader()`? (Or other headers too?) So we could mention this and link to it?

amNTLMAuthenticated supports Guzzle 7

Merge pull request #19 from Tenzian/ntlm_update

Add support for guzzle 7 client in amNTLMAuthenticated()

JsonType improvements

• Support for negative values, >= and <= matchers in JsonType comparisons .
• Improved docs for Json Matchers

Documentation updates

Merge pull request #15 from igorsantos07/patch-2

Clarify custom header configs for REST module

Response validation using JsonSchema

Add seeResponseIsValidOnJsonSchemaString and examples (#8)

* Added examples

* Use file for schema by default
Added `seeResponseIsValidOnJsonSchemaString` for checks based on string

* Use codecept_absolute_path instead of codecept_data_dir

Allow to add or remove server parameters

#7 by @svycka

Updated flow/jsonpath library to 0.5

Merge pull request #2 from eXorus/patch-1

Update composer.json

Initial release

1.0.0

Updated dependencies, added suggest