Add episode 21

Violinist, Render Arrays and Feature Flags with Eirik Morland.

source/_podcast_episodes/21-eirik-morland-violinist-2.md

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+---
+date: 2024-09-13
+topic: Violinist, Render Arrays and Feature Flags
+guests:
+  - Eirik Morland
+transistor:
+  id: a4f651a7
+links:
+  - - violinist.io
+    - https://violinist.io
+  - - Violinist on Drupal.org
+    - https://www.drupal.org/violinist
+  - - Eirik on Drupal.org
+    - https://www.drupal.org/u/eiriksm
+  - - The violinist.io Roadmap
+    - https://violinist.io/roadmap
+  - - The Violinist Teams module
+    - https://www.drupal.org/project/violinist_teams
+  - - Behat
+    - https://behat.org
+  - - Feature Flags
+    - https://martinfowler.com/articles/feature-toggles.html
+  - - Deployments vs releases
+    - /archive/2023/06/21/deployments-or-releases
+talking_points: []
+quotes: []
+chapters: []
+---
+
+Oliver is joined again by Eirik Morland (the first returning guest) to discuss recent improvements and enhancements to Violinist, such as Team support (a.k.a. multi-user subscriptions).