feat(expectations): add toMatchRegEx

src/Expectation.php

@@ -505,6 +505,16 @@ final class Expectation
         return $this;
     }
 
+    /**
+     * Asserts that the value matches a regular expression.
+     */
+    public function toMatchRegEx(string $expression): Expectation
+    {
+        Assert::assertMatchesRegularExpression($expression, $this->value);
+
+        return $this;
+    }
+
     /**
      * Asserts that the value matches a constraint.
      */