Added SBRICK package (#772)

docs/packages.md

@@ -127,6 +127,10 @@
   "name": "Pimoroni Scrollbit",
   "url":"/pkg/pimoroni/pxt-scrollbit",
   "cardType": "package"
+  }, {
+  "name": "SBRICK",
+  "url":"/pkg/vengit/pxt-sbrick",
+  "cardType": "package"
 }]
 
 ```

targetconfig.json

@@ -25,7 +25,8 @@
             "sunfounder/pxt-sloth",
             "4tronix/BitBot",
             "pimoroni/pxt-scrollbit",
-            "emwta/pxt-iBit"
+            "emwta/pxt-iBit",
+            "vengit/pxt-sbrick"
 
         ],
         "preferredRepos": [