New adapter: Verben (prebid#6490)

* New adapter: Verben

* Apply suggestion from @muuki88

* New Adapter Verben: Enabled pbs and pbs_app_supported

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Co-authored-by: Verben <support_trading@verben.com>
Co-authored-by: Muki Seiler <muuki88@users.noreply.github.com>

Author: 3 people

dev-docs/bidders/verben.md

@@ -16,8 +16,8 @@ media_types: banner, video, native
 multiformat_supported: will-bid-on-one
 userIds: all
 pbjs: true
-pbs: false
-pbs_app_supported: false
+pbs: true
+pbs_app_supported: true
 safeframes_ok: true
 sidebarType: 1
 ---