Switch to psr/container:2.0 (and raise PHP requirement to 8.0)

Author: e1himself

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ '7.1', '7.2', '7.3', '7.4', '8.0' ]
+        php: [ '8.0' ]
 
     steps:
       - uses: actions/checkout@master

composer.json

@@ -11,8 +11,8 @@
         "null-object"
     ],
     "require": {
-        "php": ">=7.1",
-        "psr/container": "^1.0"
+        "php": ">=8.0",
+        "psr/container": "^2.0"
     },
     "require-dev": {
         "peridot-php/peridot": "^1.19"

src/NullContainer.php

@@ -15,7 +15,7 @@ final class NullContainer implements ContainerInterface
      * @param string $id Identifier of the entry to look for.
      * @throws ServiceNotFound Always
      */
-    public function get($id)
+    public function get(string $id)
     {
         throw new ServiceNotFound($id);
     }
@@ -28,7 +28,7 @@ public function get($id)
      * @param string $id
      * @return false
      */
-    public function has($id)
+    public function has(string $id): bool
     {
         return false;
     }