Support php8

[marcingy]

Ideally this project would support php8 but given the version of phpunit that is used that feels very hard. It seems like support needs to be dropped for php 7.1, php 7.2 in new versions (and even potentially 7.3). That way underlying components can be updated to support 8.

[georgringer]

this patch file helps me make it work for my use case

Index: src/Adapter/AdapterContainer.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/src/Adapter/AdapterContainer.php b/src/Adapter/AdapterContainer.php
--- a/src/Adapter/AdapterContainer.php
+++ b/src/Adapter/AdapterContainer.php
@@ -162,6 +162,7 @@
      * @return bool true on success or false on failure.
      * <p>The return value will be casted to boolean if non-boolean was returned.</p>
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return isset($this->items[$offset]);
@@ -176,6 +177,7 @@
      * </p>
      * @return mixed Can return all value types.
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         if (array_key_exists($offset, $this->items) && is_callable($this->items[$offset])) {
@@ -201,6 +203,7 @@
      * </p>
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         $this->items[$offset] = $value;
@@ -215,6 +218,7 @@
      * </p>
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         unset($this->items[$offset]);
Index: src/Archive/Archive.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/src/Archive/Archive.php b/src/Archive/Archive.php
--- a/src/Archive/Archive.php
+++ b/src/Archive/Archive.php
@@ -81,6 +81,7 @@
      *
      * @return \ArrayIterator|MemberInterface[] An iterator
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new \ArrayIterator($this->getMembers());
Index: src/Resource/TeleporterContainer.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/src/Resource/TeleporterContainer.php b/src/Resource/TeleporterContainer.php
--- a/src/Resource/TeleporterContainer.php
+++ b/src/Resource/TeleporterContainer.php
@@ -132,6 +132,7 @@
      * <p>
      * The return value will be casted to boolean if non-boolean was returned.
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return isset($this->teleporters[$offset]);
@@ -146,6 +147,7 @@
      * </p>
      * @return mixed Can return all value types.
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->getTeleporter($offset);
@@ -163,6 +165,7 @@
      * </p>
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         throw new \BadMethodCallException();
@@ -177,11 +180,13 @@
      * </p>
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         throw new \BadMethodCallException();
     }

+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->teleporters);