Fixes #782: Update to Symfony 6 and require PHP ^8 (#927)

* CLI-714: Add ACSF commands. (#874)

* Add ACSF commands.

* More.

* Tons of changes.

* Some reversion.

* It works

* Login and logout commands.

* Test.

* More factories.

* Properties.

* Update acquia/coding-standards.

* PHPstan.

* Types.

* Props

* File

* Coverage.

* Rename.

* Hash.

* Tests.

* Fix

* Add list commands.

* Add list commands.

* Remove blt.yml.

* Skip test with hidden input on Windows.

* Hide base commands.

* Bit more testing.

* Coverage.

* Coverage.

* Test.

* Test.

* Assertions.

* Remove webmozart.

* Stan

* Temp

* Allow null for send_telemetry.

* Fix tests

* Fix tests.

* Remove webmozart/json and webmozart/key-value-store.

* Fixes.

* Fix tests.

* Remove test.

* Test.

* Test.

* Upgrade to Symfony 6 and PHP 8.

* CI.

* Update function signatures.

* Fix test.

* Tests

* Mutation.

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest ]
-        php: ["7.4", "8.0", "8.1"]
+        php: ["8.0", "8.1"]
     steps:
       - name: Prepare Git
         # Windows corrupts line endings on checkout, causing test failures.

.github/workflows/mutation.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.0
           tools: composer:v2
           extensions: pcov
           coverage: pcov

.gitignore

@@ -15,6 +15,7 @@ build
 tests/fixtures/.acquia/acquia-cli.json
 tests/fixtures/.acquia/cloud_api.conf
 tests/fixtures/project/.acquia-cli.yml
+tests/fixtures/project/blt/blt.yml
 
 ###> squizlabs/php_codesniffer ###
 /phpcs.xml