Merge branch '365-cache-shows-old-extension-version-after-upload' into 'develop'

Add flushing caches after successful extension import

Closes #365

See merge request t3o/ter!373

html/typo3conf/ext/ter_fe2/Classes/Task/ImportExtensionsFromQueueTask.php

@@ -88,6 +88,11 @@ class ImportExtensionsFromQueueTask extends Task
             $this->removeExtensionFromQueue($ext['extensionuid']);
         }
 
+        if (count($extensionsFromQueue) > 0) {
+            $cacheManager = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Cache\CacheManager::class);
+            $cacheManager->flushCaches();
+        }
+
         $this->logger->info('Task ImportExtensionsFromQueueTask finished');
 
         return true;