feat: [allow SDK to switch between obfuscation modes] (FF-2455) (#93)

Author: leoromanovsky

src/client/eppo-client.ts

@@ -172,7 +172,7 @@ export default class EppoClient implements IEppoClient {
   constructor(
     private configurationStore: IConfigurationStore<Flag | ObfuscatedFlag>,
     private configurationRequestParameters?: FlagConfigurationRequestParameters,
-    private readonly isObfuscated = false,
+    private isObfuscated = false,
   ) {}
 
   public setConfigurationRequestParameters(
@@ -185,6 +185,10 @@ export default class EppoClient implements IEppoClient {
     this.configurationStore = configurationStore;
   }
 
+  public setIsObfuscated(isObfuscated: boolean) {
+    this.isObfuscated = isObfuscated;
+  }
+
   public async fetchFlagConfigurations() {
     if (!this.configurationRequestParameters) {
       throw new Error(