Bump roxygen2 version to 8.0.0

Change-Id: Ib5f5c66bd3db80d147370d2f16fc1c340240477c
diff --git a/man/KorAPConnection-class.Rd b/man/KorAPConnection-class.Rd
index 3ccaae2..fd306a4 100644
--- a/man/KorAPConnection-class.Rd
+++ b/man/KorAPConnection-class.Rd
@@ -109,7 +109,7 @@
 }
 
 \seealso{
-Other initialization functions: 
+Other initialization functions:
 \code{\link{auth,KorAPConnection-method}},
 \code{\link{clearAccessToken,KorAPConnection-method}},
 \code{\link{persistAccessToken,KorAPConnection-method}}