Fixing HFC break caused by typedoc npm update

The update in npm 3 days ago in typedoc causes it to require
typescript 2.0.3 which is not compatible with HFC 0.6.

Resolved by locking down typedoc to 0.4.5.

Change-Id: If1e47c7a372854d47ea89b2ab0c4be28f407b15a
Signed-off-by: Jim Zhang <[email protected]>

Author: jimthematrix

sdk/node/package.json

@@ -38,6 +38,7 @@
     "sjcl-codec": "0.1.1",
     "sleep": "^3.0.1",
     "tar-fs": "^1.13.0",
+    "typedoc": "0.4.5",
     "typescript": "1.8.10",
     "url": "^0.11.0",
     "util": "^0.10.3",