Set 0.12 in changelog

Chemaclass · Chemaclass · commit 8daec762fbc1 · 2023-06-16T09:28:16.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
-### Unreleased
+### 0.12.0
+
+##### 2023-06-16
 
 - Fix combining mandatory and optional GET arguments
 
