Fix further linting-errors

gulp/TaskFunction.ts

@@ -5,6 +5,10 @@ import { TaskFunction }from "gulp";
  */
 declare global
 {
+    /**
+     * Represents a gulp-task.
+     */
+    // eslint-disable-next-line @typescript-eslint/naming-convention
     interface Function extends Partial<TaskFunction>
     { }
 }