Bump to js-sdk 0.7.5-rc.3

Author: richvdh

package.json

@@ -61,7 +61,7 @@
     "isomorphic-fetch": "^2.2.1",
     "linkifyjs": "^2.1.3",
     "lodash": "^4.13.1",
-    "matrix-js-sdk": "0.7.5-rc.2",
+    "matrix-js-sdk": "0.7.5-rc.3",
     "optimist": "^0.6.1",
     "q": "^1.4.1",
     "react": "^15.4.0",