include checkmate package

wibeasley · wibeasley · commit 28ed314a179f · 2018-03-06T22:15:56.000-06:00
see #159
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -42,6 +42,7 @@ Imports:
     tibble,
     tidyr
 Suggests:
+    checkmate,
     devtools,
     kableExtra,
     knitr,
