Update to use filehash 3.x.

- Resolves #21

composer.json

@@ -3,6 +3,6 @@
   "type": "drupal-module",
   "license": "GPL-2.0-or-later",
   "require": {
-    "drupal/filehash": "^2.0"
+    "drupal/filehash": "^3.0"
   }
 }

src/FixityCheckService.php

@@ -223,7 +223,7 @@ class FixityCheckService implements FixityCheckServiceInterface {
     // Assume success until proven untrue.
     $state = FixityCheck::STATE_MATCHES;
     // If column is set, only generate that hash.
-    foreach ($this->filehash->algos() as $column => $algo) {
+    foreach ($this->filehash->getEnabledAlgorithms() as $column => $algo) {
       // Nothing to do if the previous checksum value is not known.
       if (!isset($file->{$column})) {
         $state = FixityCheck::STATE_NO_CHECKSUM;