Merge pull request #146 from jasl/patch-1

Strict untrusted version for ue-ra-client sample
diff --git a/samplecode/ue-ra/ue-ra-client/Cargo.toml b/samplecode/ue-ra/ue-ra-client/Cargo.toml
index d53ead2..177147a 100644
--- a/samplecode/ue-ra/ue-ra-client/Cargo.toml
+++ b/samplecode/ue-ra/ue-ra-client/Cargo.toml
@@ -10,7 +10,7 @@
 itertools   = "*"
 sgx_types   = { rev = "v1.0.8", git = "https://github.com/baidu/rust-sgx-sdk" }
 base64      = "0.9.2"
-untrusted   = "*"
+untrusted   = "0.6.2"
 serde_json  = "1.0.24"
 num-bigint  = "*"
 bit-vec     = "*"