DonĀ“t use StatsPlots and bump to v0.6.1

Change-Id: Ibc54080801b2f151d1a3aea044cb587284fc9af7
diff --git a/test/runtests.jl b/test/runtests.jl
index 9f1536b..1604ab3 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -57,6 +57,7 @@
     @testset "DerekoVecs.jl: TSne plot" begin
         df = DerekoVecs.tsne([wpd19], ["werden", "kann"], 5)
         @test nrow(df) == 10
-        plotTsne([wpd19], ["werden", "kann"], 5)
+        df2 = df = DerekoVecs.tsne(wpd19, "werden", 5)
+        @test nrow(df2) == 5
     end
 end