Stick to GitHub Pages version

DirtyF · DirtyF · commit f9fed3a7111a · 2018-07-05T19:39:30.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -12,7 +12,7 @@ rvm:
   - 2.3
 env:
   - ""
-  - JEKYLL_VERSION=3.8.0
+  - JEKYLL_VERSION=3.7.3
 matrix:
   include:
     - # GitHub Pages
