chore: drop support for PHP 7.4 (#7076)

Author: bshaffer

composer.json

@@ -4,7 +4,7 @@
     "license": "Apache-2.0",
     "minimum-stability": "stable",
     "require": {
-        "php": ">=7.4",
+        "php": "^8.0",
         "google/cloud-core": "^1.55",
         "ramsey/uuid": "^4.2.3"
     },

src/Bucket.php

@@ -246,10 +246,8 @@ public function exists(array $options = [])
      *           are `true`, `false`, `md5` and `crc32`. If true, either md5 or
      *           crc32c will be chosen based on your platform. If false, no
      *           validation hash will be sent. Choose either `md5` or `crc32` to
-     *           force a hash method regardless of performance implications. In
-     *           PHP versions earlier than 7.4, performance will be very
-     *           adversely impacted by using crc32c unless you install the
-     *           `crc32c` PHP extension. **Defaults to** `true`.
+     *           force a hash method regardless of performance implications.
+     *           **Defaults to** `true`.
      *     @type int $chunkSize If provided the upload will be done in chunks.
      *           The size must be in multiples of 262144 bytes. With chunking
      *           you have increased reliability at the risk of higher overhead.
@@ -365,10 +363,8 @@ public function upload($data, array $options = [])
      *           are `true`, `false`, `md5` and `crc32`. If true, either md5 or
      *           crc32c will be chosen based on your platform. If false, no
      *           validation hash will be sent. Choose either `md5` or `crc32` to
-     *           force a hash method regardless of performance implications. In
-     *           PHP versions earlier than 7.4, performance will be very
-     *           adversely impacted by using crc32c unless you install the
-     *           `crc32c` PHP extension. **Defaults to** `true`.ß
+     *           force a hash method regardless of performance implications.
+     *           **Defaults to** `true`.
      *     @type string $predefinedAcl Predefined ACL to apply to the object.
      *           Acceptable values include, `"authenticatedRead"`,
      *           `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`,

src/StreamWrapper.php

@@ -120,9 +120,7 @@ public function __destruct()
     }
 
     /**
-     * Starting PHP 7.4, this is called when include/require is used on a stream.
-     * Absence of this method presents a warning.
-     * https://www.php.net/manual/en/migration74.incompatible.php
+     * This is called when include/require is used on a stream.
      */
     public function stream_set_option()
     {