bump rlang version (#2735)

Dana Paige Seidel · web-flow · commit 3d022edf35a5 · 2018-07-06T10:48:39.000-07:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -26,7 +26,7 @@ Imports:
     mgcv,
     plyr (>= 1.7.1),
     reshape2,
-    rlang,
+    rlang (>= 0.2.1),
     scales (>= 0.5.0),
     stats,
     tibble,
