Merge pull request #208 from clue-labs/php8.1

Support PHP 8.1 release

Author: clue

.github/workflows/ci.yml

@@ -10,6 +10,7 @@ jobs:
     strategy:
       matrix:
         php:
+          - 8.1
           - 8.0
           - 7.4
           - 7.3

README.md

@@ -119,7 +119,7 @@ See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
 This project aims to run on any platform and thus does not require any PHP
 extensions and supports running on legacy PHP 5.3 through current PHP 8+ and
 HHVM.
-It's *highly recommended to use PHP 7+* for this project.
+It's *highly recommended to use the latest supported PHP version* for this project.
 
 You may also want to install some of the [additional components](#components).
 A list of all official components can be found in the [graphp project](https://github.com/graphp).

phpunit.xml.dist

@@ -4,8 +4,9 @@
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
          bootstrap="vendor/autoload.php"
+         cacheResult="false"
          colors="true"
-         cacheResult="false">
+         convertDeprecationsToExceptions="true">
     <testsuites>
         <testsuite name="Graph test suite">
             <directory>./tests/</directory>

src/Set/Edges.php

@@ -383,6 +383,7 @@ public function getVector()
      * @return int
      * @see self::isEmpty()
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->edges);
@@ -409,6 +410,7 @@ public function isEmpty()
      *
      * @return \IteratorIterator
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new \IteratorIterator(new \ArrayIterator($this->edges));

src/Set/Vertices.php

@@ -411,6 +411,7 @@ public function getVector()
      * @return int
      * @see self::isEmpty()
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->vertices);
@@ -448,6 +449,7 @@ public function hasDuplicates()
      *
      * @return \IteratorIterator
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new \IteratorIterator(new \ArrayIterator($this->vertices));