Bump up the version

satoryu · satoryu · commit 62343e1ac15c · 2020-02-10T00:36:29.000+09:00
diff --git a/lib/docx/version.rb b/lib/docx/version.rb
@@ -1,3 +1,3 @@
 module Docx #:nodoc:
-  VERSION = '0.3.0'
+  VERSION = '0.4.0'
 end
