feat: user agent

Author: SSebo

src/FeatureProbe.ts

@@ -3,6 +3,9 @@ import { TinyEmitter } from 'tiny-emitter';
 import { Base64 } from 'js-base64';
 import { FPUser } from './FPUser';
 
+const PKG_VERSION = require("../package.json").version;
+const USER_AGENT = "Js/" + PKG_VERSION;
+
 const EVENTS = {
   READY: 'ready',
   ERROR: 'error',
@@ -212,6 +215,7 @@ class FeatureProbe extends TinyEmitter {
       headers: {
         Authorization: this.clientSdkKey,
         'Content-Type': 'application/json',
+        'User-Agent': USER_AGENT,
       },
     })
       .then((response) => {
@@ -251,6 +255,7 @@ class FeatureProbe extends TinyEmitter {
         headers: {
           Authorization: this.clientSdkKey,
           'Content-Type': 'application/json',
+          'User-Agent': USER_AGENT,
         },
         body: JSON.stringify(payload),
       });