add merchant 'hammock universe'

_data/merchants.yml

@@ -205,6 +205,8 @@
       url: http://art2unlimited.webs.com/
     - name: Game of Cryptos
       url: https://gameofcryptos.com/
+    - name: Hammock Universe
+      url: https://www.hammockuniverseusa.com/
     - name: Handcrafted goods
       url: https://mychain.store/
     - name: InvestmentArt