warnings not defined in wt.artists (version 2.13.9)
`File "/home/darien/source/WrightTools/WrightTools/artists.py", line 485, in plot_data`
`warnings.warn(wt_exceptions.VisibleDeprecationWarning(message))`
`NameError: name 'warnings' is not defined`

diff --git a/WrightTools/artists.py b/WrightTools/artists.py
index 31f37b5..c46023e 100644
--- a/WrightTools/artists.py
+++ b/WrightTools/artists.py
@@ -32,6 +32,8 @@ import matplotlib.patheffects as PathEffects
 
 import imageio
 
+import warnings
+
 from . import exceptions as wt_exceptions
 from . import data as wt_data
 from . import kit as wt_kit
['WrightTools/artists.py']