chore: release 0.5.1-alpha (#501)

Author: ianbotsf

CHANGELOG.md

@@ -0,0 +1,15 @@
+# Changelog
+
+## [0.5.1-alpha] - 10/14/2021
+
+**WARNING: Alpha releases may contain bugs and no guarantee is made about API stability. They are not recommended for production use!**
+
+## New features
+
+* http client engine config [#493](https://github.com/awslabs/smithy-kotlin/pull/493)
+* add codegen wrappers for retries [#490](https://github.com/awslabs/smithy-kotlin/pull/490)
+
+### Fixes
+
+* remove gson from dependencies [#496](https://github.com/awslabs/smithy-kotlin/pull/496)
+

gradle.properties

@@ -12,7 +12,7 @@ android.useAndroidX=true
 android.enableJetifier=true
 
 # SDK
-sdkVersion=0.5.1-SNAPSHOT
+sdkVersion=0.5.1-alpha
 
 # kotlin
 kotlinVersion=1.5.30