[release] 5.21.0 - Expose evaluation details and ID type (#452)

Added evaluation details to the result of the following APIs:
- `getGate`, 
- `getConfig`
- `getExperiment`
- `getLayer` 

Added ID type to the result of the following APIs:
- `getGate`,
- `getConfig`
- `getExperiment`

Internal changes:
- Exclude segments from secondary exposures and changed how secondary
exposures are deduped.





>Included In This Release
>- 73fe80a kenny-statsig
>   - expose evaluation details (#451)
>- fe2b8cb kenny-statsig
>   - expose idType of gate, config, experiment (#450)
>- 84cd71c kenny-statsig
>   - Filter exposures from evaluations (#449)
>- f8aaf86 kenny-statsig
>   - filter segments from secondary exposures (#448)

---------

Co-authored-by: statsig-kong[bot] <statsig-kong[bot]@users.noreply.github.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "statsig-node",
-  "version": "5.20.0",
+  "version": "5.21.0",
   "description": "Statsig Node.js SDK for usage in multi-user server environments.",
   "main": "dist/index.js",
   "scripts": {

src/__tests__/data/initialize_response.json

@@ -126,7 +126,7 @@
   "generator": "statsig-node-sdk",
   "sdkInfo": {
     "sdkType": "statsig-node",
-    "sdkVersion": "5.20.0"
+    "sdkVersion": "5.21.0"
   },
   "evaluated_keys": {
     "userID": "123"