Allow http-hmac-php work with psr/http-message 1 and 2.

Support for PHP8, Symfony 4.4 and 5.3, Drop support for PHP 7.2 and b…

…elow.

* Allow php8 in composer.json (fixes #57)

* Apply feedback

* update travis, drop 7.2

* drop more things

* fix travis

* Use isMainRequest and add backwards compatibility for isMasterRequest.

* Don't enforce deprecations when testing 5.3

* Fix method exists.

* Update CS fixer, use matrix for failing 4.4 on php 8.

* Correct use of matrix.

* Updates to PHP CS Fixer config.

* php fixer fixes.

* Fix a space

Co-authored-by: Jakob Perry <japerry007@gmail.com>

Update dependencies to support PHP 7.4 (#56)

Revert "Revert "Update diactoros to support Drupal 8.6+. (#52)" (#53)… (

#54)

* Revert "Revert "Update diactoros to support Drupal 8.6+. (#52)" (#53)" And keep 5.6 support.

This reverts commit 0646e4a.

* Add back testing for PHP 5.6

Revert "Update diactoros to support Drupal 8.6+. (#52)" (#53)

Update diactoros to support Drupal 8.6+. (#52)

* Update diactoros to support Drupal 8.6+.
* Reverse the if statements for Diactoros.
* Update to php 7.3, fix some linting.

Switch to PHP-CS-Fixer (#45)

Update README in preparation of the 4.0.0 release (#44)