upgrade to latest dependencies

composer.json

@@ -4,12 +4,11 @@
     "license": "MIT",
     "require": {
         "php": "^7.2||^8.0",
-        "psr/container": "^1.0"
+        "psr/container": "^2.0"
     },
     "require-dev": {
-        "phpbench/phpbench": "@dev",
-        "phpunit/phpunit": "^8.0||^9.0",
-        "doctrine/coding-standard": "^8.0"
+        "phpunit/phpunit": "^9.0",
+        "doctrine/coding-standard": "^9.0"
     },
     "autoload": {
         "psr-4": {

phpunit.xml.dist

@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit colors="true">
-    <testsuites>
-        <testsuite name="Unit tests">
-            <directory>tests/</directory>
-        </testsuite>
-    </testsuites>
-    <filter>
-      <whitelist processUncoveredFilesFromWhitelist="true">
-        <directory suffix=".php">src</directory>
-      </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="Unit tests">
+      <directory>tests/</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>

src/ServiceContainer.php

@@ -79,7 +79,7 @@ public function factory(string $id): callable
      *
      * @template T
      */
-    public function get($id) // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint,SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint,Generic.Files.LineLength.TooLong
+    public function get(string $id) // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint,SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint,Generic.Files.LineLength.TooLong
     {
         if (isset($this->instances[$id])) {
             return $this->instances[$id]; // try load a singleton if saved
@@ -101,7 +101,7 @@ public function get($id) // phpcs:ignore SlevomatCodingStandard.TypeHints.Parame
      *
      * @param string $id Identifier of the entry to look for.
      */
-    public function has($id) // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint,SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingAnyTypeHint,Generic.Files.LineLength.TooLong
+    public function has(string $id): bool
     {
         // is existing singleton
         if (isset($this->instances[$id])) {
@@ -128,7 +128,7 @@ public function has($id) // phpcs:ignore SlevomatCodingStandard.TypeHints.Parame
      *
      * @return mixed|null
      */
-    public function singleton(string $id)
+    public function singleton(string $id) // phpcs:ignore SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint,Generic.Files.LineLength.TooLong
     {
         return $this->instances[$id] ?? null;
     }
@@ -159,7 +159,7 @@ public function make(string $id) // phpcs:ignore SlevomatCodingStandard.TypeHint
      * @param string $id    ID of entry
      * @param mixed  $entry actual entry
      */
-    public function set(string $id, $entry): void
+    public function set(string $id, $entry): void // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint,Generic.Files.LineLength.TooLong
     {
         $this->instances[$id] = $entry;
     }
@@ -171,7 +171,7 @@ public function set(string $id, $entry): void
      *
      * @return mixed|null
      */
-    public function unset(string $id)
+    public function unset(string $id) // phpcs:ignore SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint,Generic.Files.LineLength.TooLong
     {
         if (isset($this->instances[$id])) {
             $instance = $this->instances[$id];