Update History.markdown

DirtyF · web-flow · commit bae143f85779 · 2017-12-04T10:36:13.000+01:00
diff --git a/History.markdown b/History.markdown
@@ -1,5 +1,7 @@
 ## HEAD
 
+## 0.13.0 / 2017-12-03
+
   * Test against same version of Ruby that GitHub Pages uses (#132)
 
 ### Development Fixes
