Update swift-sdk to v0.21.0

glennrfisher · glennrfisher · commit 50020310f730 · 2018-02-01T12:31:27.000-06:00
diff --git a/Cartfile.resolved b/Cartfile.resolved
@@ -1,4 +1,4 @@
 github "daltoniam/Starscream" "3.0.4"
 github "daltoniam/common-crypto-spm" "1.1.0"
 github "daltoniam/zlib-spm" "1.1.0"
-github "watson-developer-cloud/swift-sdk" "v0.20.0"
+github "watson-developer-cloud/swift-sdk" "v0.21.0"
