Add magento/framework as composer dev dependency

This avoids problems when running phpstan within phpunit and Magento
classes not being loadable.

Author: shochdoerfer

composer.json

@@ -6,7 +6,6 @@
   "config": {
     "sort-packages": true
   },
-
   "license": "MIT",
   "authors": [
     {
@@ -24,6 +23,7 @@
     "bitexpert/phing-securitychecker": "^0.4.0",
     "captainhook/captainhook": "^5.1.2",
     "captainhook/plugin-composer": "^5.1.3",
+    "magento/framework": "^102.0",
     "mikey179/vfsstream": "^1.6",
     "nikic/php-parser": "^4.3",
     "phing/phing": "^2.16",
@@ -57,5 +57,11 @@
         "extension.neon"
       ]
     }
-  }
+  },
+  "repositories": [
+    {
+      "type": "composer",
+      "url": "https://repo.magento.com/"
+    }
+  ]
 }