Update Dependencies (#390)

Co-authored-by: Norwin Roosen <git@nroo.de>
Co-authored-by: Norwin <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/390
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Norwin <noerw@noreply.gitea.io>
Co-committed-by: Norwin <noerw@noreply.gitea.io>

vendor/github.com/microcosm-cc/bluemonday/stringwriterwriter_go1.12.go

@@ -0,0 +1,10 @@
+// +build go1.12
+
+package bluemonday
+
+import "io"
+
+type stringWriterWriter interface {
+	io.Writer
+	io.StringWriter
+}