Bump roxygen2 version to 8.0.0

Change-Id: Ib5f5c66bd3db80d147370d2f16fc1c340240477c
diff --git a/man/synsemanticStopwords.Rd b/man/synsemanticStopwords.Rd
index 560e53f..02274e2 100644
--- a/man/synsemanticStopwords.Rd
+++ b/man/synsemanticStopwords.Rd
@@ -21,7 +21,7 @@
 Currently only suitable for German. See stopwords package for other languages.
 }
 \seealso{
-Other collocation analysis functions: 
+Other collocation analysis functions:
 \code{\link{association-score-functions}},
 \code{\link{collocationAnalysis,KorAPConnection-method}},
 \code{\link{collocationScoreQuery,KorAPConnection-method}}