chore: prepare for 0.5.3 release (#44)

Author: ianbotsf

gradle.properties

@@ -4,7 +4,7 @@ kotlin.mpp.stability.nowarn=true
 # kotlin.native.ignoreDisabledTargets=true
 
 # aws-crt-kotlin
-sdkVersion=0.5.2
+sdkVersion=0.5.3-SNAPSHOT
 
 # kotlin
 kotlinVersion=1.6.10