Update to use Monolog v3 & PHP 8.1

Allow PHP ^8 and PHPUnit ^9.4 (maxbanton#91)

* Allow PHP ^8 and PHPUnit ^9.4

* Update composer.json

* Update composer.json

* Update composer.json

* Update composer.json

Co-authored-by: Max Leonov <[email protected]>

Update composer.json

PHP7 + Monolog 2 (maxbanton#78)

* Dependencies updated + composer.lock removed + GH Actions skeleton

* Removed .travis.yml

* Fix

* PHP 7

* Fix

* mbstring extension

* Test failed test

* Fix

* Added coveralls

* Fix

* Run only on push

* Up

* Up

* Optimize composer autoload

* Cosmetic

* Readme update

* Cosmetic

* Order changed

* issue template removed

Added option to disable creating the log group (maxbanton#75)

* Added option to disable creating the log group

* Move create group option to constructor

* Move paragraph to relevant section in README

Sort log entries chronologically before calling PutLogEvents. (maxban…

…ton#70)

See issues maxbanton#32 and maxbanton#69 for more context.

Do not overshadow errors thrown by DescribeLogGroups. (maxbanton#68)

If DescribeLogGroups throws an error (e.g. AccessDeniedException), the retry logic
will still call DescribeLogStreams, which will also fail, either with
AccessDeniedException, or, more confusingly, with "The specified log group
does not exist." if the log group has never been created.

This change makes sure that the original error is thrown.

Consider to flush buffer after a record has been processed (maxbanton#62

)

* Consider to flush buffer after a record has been processed

* Fix syntax

Refresh with fresh sequence token (maxbanton#56)

* Refresh with fresh sequence token

* reformats phpdoc to fit within 140 characters

Fix: Support for max event size limit (maxbanton#50)