Add BunkerVPN to merchants

Fix #519

_data/merchants.yml

@@ -130,6 +130,8 @@
       url: https://algostrategic.com
     - name: Azur Samui - Luxury Apartment and Villa Development, Koh, Samui, Thailand
       url: http://www.azursamui.com
+    - name: BunkerVPN (Ethical VPN Provider)
+      url: https://bunkervpn.com
     - name: California Fintech Network
       url: https://www.californiafintech.org/plans/
       name: Computer Lab - React, Django, Security Consultancy in NYC