add ZeroMQ (#2115)

Closes #2049

_data/simple-icons.json

@@ -4432,6 +4432,11 @@
             "hex": "03363D",
             "source": "https://www.zendesk.com/company/brand-assets/#logo"
         },
+        {
+            "title": "ZeroMQ",
+            "hex": "DF0000",
+            "source": "https://github.com/zeromq/zeromq.org/blob/master/static/safari-pinned-tab.svg"
+        },
         {
             "title": "Zerply",
             "hex": "9DBC7A",

icons/zeromq.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>ZeroMQ icon</title><path d="M22.088,5.499l1.894-1.894l-3.587-3.587l-1.894,1.894C16.627,0.702,14.396,0,12,0C5.373,0,0,5.373,0,12c0,2.396,0.702,4.627,1.912,6.501l-1.894,1.894l3.587,3.587l1.894-1.894C7.373,23.298,9.604,24,12,24c6.627,0,12-5.373,12-12C24,9.604,23.298,7.373,22.088,5.499z M4.569,12c0-4.104,3.327-7.431,7.431-7.431c1.125,0,2.191,0.25,3.146,0.698l-9.88,9.88C4.819,14.191,4.569,13.125,4.569,12z M12,19.431c-1.125,0-2.191-0.25-3.146-0.698l9.88-9.88c0.447,0.956,0.698,2.022,0.698,3.146C19.431,16.104,16.104,19.431,12,19.431z"/></svg>