bump version to 0.0-4

Author: krlmlr

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: styler
 Title: Non-invasive Pretty Printing of R code
-Version: 0.0-3
+Version: 0.0-4
 Authors@R: person("Kirill", "Müller", role = c("aut", "cre"), email = "[email protected]")
 Description:
     Pretty-prints R code without changing the user's formatting intent.