Merge branch 'master' into nested-higher-order-expectations

# Conflicts:
#	tests/.snapshots/success.txt

src/Expectation.php

@@ -64,6 +64,14 @@ final class Expectation
         return new self($value);
     }
 
+    /**
+     * Creates a new expectation with the decoded JSON value.
+     */
+    public function json(): Expectation
+    {
+        return $this->toBeJson()->and(json_decode($this->value, true));
+    }
+
     /**
      * Dump the expectation value and end the script.
      *