Bump VERSION to 3.0.4.

VERSION

@@ -1 +1 @@
-3.0.3
+3.0.4

doc-src/HAML_CHANGELOG.md

@@ -3,6 +3,12 @@
 * Table of contents
 {:toc}
 
+## 3.0.4
+
+[Tagged on GitHub](http://github.com/nex3/haml/commit/3.0.4).
+
+There were no changes made to Haml between versions 3.0.3 and 3.0.4.
+
 ## 3.0.3
 
 [Tagged on GitHub](http://github.com/nex3/haml/commit/3.0.3).

doc-src/SASS_CHANGELOG.md

@@ -3,7 +3,9 @@
 * Table of contents
 {:toc}
 
-## 3.0.4 (Unreleased)
+## 3.0.4
+
+[Tagged on GitHub](http://github.com/nex3/haml/commit/3.0.4).
 
 * Raise an informative error when function arguments have a mispaced comma,
   as in `foo(bar, )`.