Do not import but only suggest lifecycle

Change-Id: Id228b29322cc65b86e24be81d14332ed563129fb
diff --git a/DESCRIPTION b/DESCRIPTION
index 3b8f051..87b0429 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -39,7 +39,6 @@
     magrittr,
     tidyr,
     dplyr,
-    lifecycle,
     lubridate,
     highcharter,
     jsonlite,
@@ -52,6 +51,7 @@
     stringr,
     urltools
 Suggests:
+    lifecycle,
     testthat
 Collate: 
     'KorAPConnection.R'