Bump version to 3

hartwork · hartwork · commit de276f779cd0 · 2020-02-19T17:43:46.000+01:00
diff --git a/slides.pin b/slides.pin
@@ -20,7 +20,7 @@
 
 
 \--
-<i><span size='x-small'>Berlin, 2020-02-18, v2
+<i><span size='x-small'>Berlin, 2020-02-18, v3
 Licensed under CC-BY-SA 4.0</span></i>
 
 --
