prepare 8.1.0 release (#251)

## [8.1.0] - 2024-03-07
### Added:
- Added Android only config option generateAnonymousKeysAndroid. This
directly maps to the Android SDK config option
[generateAnonymousKeys](https://launchdarkly.github.io/android-client-sdk/com/launchdarkly/sdk/android/LDConfig.Builder.html#generateAnonymousKeys(boolean)).

Co-authored-by: Yusinto Ngadiman <[email protected]>

Author: LaunchDarklyReleaseBot

android/src/main/java/com/launchdarkly/reactnative/LaunchdarklyReactNativeClientModule.java

@@ -330,7 +330,12 @@ private LDConfig.Builder buildConfiguration(ReadableMap config) {
         }
 
         LDConfig.Builder builder = new LDConfig.Builder(autoEnvAttributes);
-        builder.generateAnonymousKeys(true);
+
+        if (validateConfig("generateAnonymousKeysAndroid", config, ReadableType.Boolean)) {
+            builder.generateAnonymousKeys(config.getBoolean("generateAnonymousKeysAndroid"));
+        } else {
+            builder.generateAnonymousKeys(true);
+        }
 
         // configure trivial options
         for (ConfigMapping entry : ConfigMapping.values()) {

index.d.ts

@@ -226,6 +226,16 @@ declare module 'launchdarkly-react-native-client-sdk' {
      * You can also specify this on a per-context basis with {@link LDContextMeta.privateAttributes}
      */
     privateAttributes?: string[];
+
+    /**
+     * Android only.
+     *
+     * Set to true to make the SDK provide unique keys for anonymous contexts.
+     * Read more at https://launchdarkly.github.io/android-client-sdk/com/launchdarkly/sdk/android/LDConfig.Builder.html#generateAnonymousKeys(boolean).
+     *
+     * The default is true.
+     */
+    generateAnonymousKeysAndroid?: boolean;
   };
 
   /**