[release] v1.29.0 - Fallback to Statsig API (#227)

### New Features
- New option `FallbackToStatsigAPI` to allow network requests to retry
using Statsig API
  ### Improvements
  - Improve performance of case-insensitive string
  - Add `GroupName` and `HashUsed` to the client initialize response
equality check





>Included In This Release
>- 37fde30 sroyal-statsig
>   - Add Group Name to GCIR (#226)
>- 17bc997 kenny-statsig
>   - Diagnostics for retries (#212)
>- 7455f38 kenny-statsig
>   - API override for retry requests (#208)
>- d6add30 kenny-statsig
>   - Optimize case insensitive equality checks (#222)
>- 9eba861 kenny-statsig
>   - Remove unused argument (#224)

statsig_metadata.go

@@ -14,7 +14,7 @@ type statsigMetadata struct {
 func getStatsigMetadata() statsigMetadata {
 	return statsigMetadata{
 		SDKType:         "go-sdk",
-		SDKVersion:      "v1.28.1",
+		SDKVersion:      "v1.29.0",
 		LanguageVersion: runtime.Version()[2:],
 		SessionID:       SessionID(),
 	}