Update compatibility table

Also removed support for phpspec v6.0,
since it doesn't work with PHP 8.1 or
higher.

Author: jaylinski

README.md

@@ -21,12 +21,12 @@ expect(file_exists('dummy.txt'))->toBe(true);
 
 ## Compatibility
 
-| phpspec-expect | PHP      | phpspec                    |
-|----------------|----------|----------------------------|
-| 2.x            | `>=5.6`  | `^3.0`                     |
-| 3.0.x          | `>=7.0`  | `^4.0`                     |
-| 3.1.x          | `^7.1`   | `^5.0 \|\| ^6.0`           |
-| 4.x            | `>=7.3`  | `^6.0 \|\| ^7.0`           |
+| phpspec-expect | PHP     | phpspec          |
+|----------------|---------|------------------|
+| 3.0.x          | `>=7.0` | `^4.0`           |
+| 3.1.x          | `^7.1`  | `^5.0 \|\| ^6.0` |
+| 4.0.x          | `>=7.3` | `^6.0 \|\| ^7.0` |
+| 4.1.x          | `>=8.1` | `^7.0 \|\| ^8.0` |
 
 ## Authors
 

composer.json

@@ -24,7 +24,7 @@
     },
     "require": {
         "php": ">=8.1",
-        "phpspec/phpspec": "^6.0 || ^7.0 || ^8.0"
+        "phpspec/phpspec": "^7.0 || ^8.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.0 || ^11.0 || ^12.0",