Add missing @return $this annotations

LinkedInOptions.php

@@ -55,62 +55,89 @@ public static function fromNotification(Notification $notification): self
         return $options;
     }
 
+    /**
+     * @return $this
+     */
     public function contentCertificationRecord(string $contentCertificationRecord): self
     {
         $this->options['contentCertificationRecord'] = $contentCertificationRecord;
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function firstPublishedAt(int $firstPublishedAt): self
     {
         $this->options['firstPublishedAt'] = $firstPublishedAt;
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function lifecycleState(LifecycleStateShare $lifecycleStateOption): self
     {
         $this->options['lifecycleState'] = $lifecycleStateOption->lifecycleState();
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function origin(string $origin): self
     {
         $this->options['origin'] = $origin;
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function ugcOrigin(string $ugcOrigin): self
     {
         $this->options['ugcOrigin'] = $ugcOrigin;
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function versionTag(string $versionTag): self
     {
         $this->options['versionTag'] = $versionTag;
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function specificContent(ShareContentShare $specificContent): self
     {
         $this->options['specificContent']['com.linkedin.ugc.ShareContent'] = $specificContent->toArray();
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function author(AuthorShare $authorOption): self
     {
         $this->options['author'] = $authorOption->author();
 
         return $this;
     }
 
+    /**
+     * @return $this
+     */
     public function visibility(VisibilityShare $visibilityOption): self
     {
         $this->options['visibility'] = $visibilityOption->toArray();