Correctly run untitled scenario outlines

This fixes #731.

Author: badeball

features/issues/731.feature

@@ -0,0 +1,21 @@
+# https://github.com/badeball/cypress-cucumber-preprocessor/issues/731
+
+Feature: blank titles
+  Scenario: blank scenario outline title
+    Given a file named "cypress/e2e/a.feature" with:
+      """
+      Feature: a feature
+        Scenario Outline:
+          Given a step
+
+          Examples:
+            | value |
+            | foo   |
+      """
+    And a file named "cypress/support/step_definitions/steps.js" with:
+      """
+      const { Given } = require("@badeball/cypress-cucumber-preprocessor");
+      Given("a step", () => {})
+      """
+    When I run cypress
+    Then it passes

lib/create-tests.ts

@@ -241,10 +241,7 @@ function createScenario(
 
       const pickle = findPickleById(context, exampleId);
 
-      const baseName = assertAndReturn(
-        pickle.name,
-        "Expected pickle to have a name"
-      );
+      const baseName = pickle.name || "<unamed scenario>";
 
       const exampleName = `${baseName} (example #${i + 1})`;