pl-api: define support for status preview for mitra

Signed-off-by: Nicole Mikołajczyk <git@mkljczk.pl>

packages/pl-api/lib/client.ts

@@ -2004,7 +2004,11 @@ class PlApiClient {
         fixedParams.visibility = 'circle';
       }
 
-      const response = await this.request('/api/v1/statuses', {
+      const input = params.preview && this.features.version.software === MITRA
+        ? '/api/v1/statuses/preview'
+        : '/api/v1/statuses';
+
+      const response = await this.request(input, {
         method: 'POST',
         body: fixedParams,
       });

packages/pl-api/lib/features.ts

@@ -472,10 +472,12 @@ const getFeatures = (instance: Instance) => {
 
     /**
      * @see POST /api/v1/statuses
+     * @see POST /api/v1/statuses/preview
      */
     createStatusPreview: any([
       v.software === AKKOMA,
       v.software === PLEROMA,
+      v.software === MITRA,
     ]),
 
     /**