Merge pull request #13 from jsickcodes/release-0.4.0

Increment version for 0.4.0 release

Author: jonathansick

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = docxplain
-version = 0.3.0
+version = 0.4.0
 description = Convert Office (docx) files to plain text using pandoc.
 author = Jonathan Sick
 author_email = hi@jsick.codes