feat: PHP 7.4 support (#171)

* chore: adjust psr-log version to work with Drupal

* chore: set PHP versions to 7.4

* chore: remove union-with-null types

* chore: add psr/simple-cache downversion option

* chore: removed references to mixed type

* chore: capture all exceptions into vars

* chore: removing more union types

* chore: remove trailing comma

* chore: remove union type

* chore: update logfile for downversioned psr stuff

* chore: remove named parameter

* chore: remove use of 'match'

* chore: remove str_ends_with usage

* chore: remove throw in expression

* chore: remove named params from tests

* chore: update PSR16 method signatures

* chore: fix straggling test

* feat: bump version

composer.json

@@ -39,22 +39,19 @@
         }
     },
     "require": {
-        "php": ">=8.0",
+        "php": ">=7.4",
         "ext-grpc": "*",
         "firebase/php-jwt": "^6.3",
         "google/protobuf": "3.22.3",
         "grpc/grpc": "1.52.0",
-        "psr/log": "^2.0 || ^3.0",
-        "psr/simple-cache": "^3.0"
+        "psr/log": "^1.1 || ^2.0 || ^3.0",
+        "psr/simple-cache": "^1.0.1 || ^3.0"
     },
     "require-dev": {
         "composer/composer": "^2.4.1",
         "phpunit/phpunit": "^9.5.23"
     },
     "config": {
-        "platform": {
-            "php": "8.0"
-        },
         "optimize-autoloader": true,
         "preferred-install": "dist",
         "sort-packages": true