[release] 1.24.0 - Support Config Specs Streaming through GRPC (#346)

### New Features
- Support streaming changes from Statsig Forward Proxy to SDK instead of
polling config changes. Details can be found here
https://docs.statsig.com/server/concepts/forward_proxy
  ### Improvements
  - Prevent bad config value for event queue size
    - 





>Included In This Release
>- 1a2f90a andyphan-statsig
> - Customize sources to get for initialization and config sync behavior
(#336)
>- f218853 Xin Li
>   - safe get event q size (#344)
>- a307292 Xin Li
>   - remove println (#342)
>- dd19ed1 Xin Li
>   - Retry 3 times failed test (#341)
>- b2ac1a5 Weihao Ding
>   - fix: remove private attributes from gcir (#340)
>- b85eb64 andyphan-statsig
>   - gRPC forward proxy integration (#271)
>- 6bef5e9 Xin Li
>   - Update kong.yml (#339)
>- dd71f72 andyphan-statsig
>   - chore: move GsonBuilder to Utils (#331)

gradle.properties

@@ -7,7 +7,7 @@ SONATYPE_AUTOMATIC_RELEASE=true
 
 GROUP=com.statsig.serversdk
 POM_ARTIFACT_ID=serversdk
-VERSION_NAME=1.23.1
+VERSION_NAME=1.24.0
 
 POM_NAME=Statsig Server SDK
 POM_DESCRIPTION=A feature gating and a/b testing library for statsig

src/main/kotlin/com/statsig/sdk/StatsigMetadata.kt

@@ -4,7 +4,7 @@ import com.google.gson.annotations.SerializedName
 import java.util.Properties
 import java.util.UUID
 
-private const val VERSION = "1.23.1"
+private const val VERSION = "1.24.0"
 
 internal data class StatsigMetadata(@SerializedName("sdkType") var sdkType: String = "java-server", @SerializedName("sessionID") var sessionID: String = UUID.randomUUID().toString(), @SerializedName("languageVersion") var languageVersion: String = System.getProperty("java.version"), @SerializedName("exposureLoggingDisabled") var exposureLoggingDisabled: Boolean? = null) {
     @SerializedName("sdkVersion")