German Translations (#598)

* Update de.toml

* Update CONTRIBUTORS.md

CONTRIBUTORS.md

@@ -101,3 +101,4 @@
 - [kuba86](https://kuba86.com)
 - [Vladislav Matus](https://github.com/matusvla)
 - [Kirill Feoktistov](https://feoktistoff.org)
+- [Michael Weiss](https://mweiss.ch)

i18n/de.toml

@@ -1,12 +1,27 @@
 [category]
 other = "Kategorie"
 
+[categories]
+other = "Kategorien"
+
 [tag]
 other = "Tag"
 
+[tags]
+other = "Tags"
+
 [series]
 other = "Serie"
 
+[author]
+other = "Autor"
+
+[authors]
+other = "Autoren"
+
+[posts]
+other = "Beiträge"
+
 [reading_time]
 one = "Eine Minute Lesezeit"
 other = "{{ .Count }} Minuten Lesezeit"
@@ -22,3 +37,27 @@ other = "Du kannst hier zurück zur <a href=\"{{ . }}\">Startseite</a>."
 
 [powered_by]
 other = "Gestaltet mit"
+
+[see_also]
+other = "Siehe auch in"
+
+[note]
+other = "Bemerkung"
+
+[tip]
+other = "Tipp"
+
+[example]
+other = "Beispiel"
+
+[question]
+other = "Frage"
+
+[info]
+other = "Info"
+
+[warning]
+other = "Warnung"
+
+[error]
+other = "Fehler"