Bump dev version 0.2.0.9000

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: xaringanthemer
 Type: Package
 Title: Xaringan CSS Theme Generator
-Version: 0.2.0
+Version: 0.2.0.9000
 Date: 2018-04-16
 Authors@R: person("Garrick", "Aden-Buie", email = "[email protected]", role = c("aut", "cre"))
 Description: Create and edit your xaringan CSS files from within your R