Final: Updating this to support php8.x still supports 5.x and 7.x

[fr3nch13]

This is a new pull request. I closed the other one. This one supports PHP 5.5, 5.6, 7.0, 7.1, 7.2, 7.4, 8.0, 8.1, 8.2.

It stems from an error I am getting with php 8.2:

deprecated: 8192 :: Creation of dynamic property josegonzalez\Dotenv\Expect::$environment is deprecated on line 14 of vendor/josegonzalez/dotenv/src/josegonzalez/Dotenv/Expect.php

This fixes that and updates the CI workflow.

[fr3nch13]

This doesn't seem to be including the github actions, but I think that's because your master branch doesn't have them setup in the first place.
However, you can see the latest actions from my fork here: https://github.com/302dev/php-dotenv/actions

It also uses docdecov.io coverage reports as seen in this pull request: 302dev#1 and here https://app.codecov.io/gh/302dev/cakephp
It uses this github app: https://github.com/marketplace/codecov
Basically, you just need to configure them to talk to each other, then add the secret CODECOV_TOKEN to your github repo here: https://github.com/josegonzalez/php-dotenv/settings/secrets/actions

[fr3nch13]

Is there any way you could set up another branch that could be used for testing/dev before the code goes to master? Something like version-next or development? Then I could switch this pull request to point to that.
I ask, so that I can update my composer.json to use josegonzales/php-dotenv:development instead of master so the php 8.2.2 error will go away in my unit testing. I really don't want to point it to my fork.

[fr3nch13]

Closing as I need the pull request to use a different branch. See #55