Added 'text-shadow' CSS attribute to valid list of text attributes.

Johann du Toit · Johann du Toit · commit 3526b1c775ea · 2016-04-08T15:03:49.000+10:00
diff --git a/toyplot/require.py b/toyplot/require.py
@@ -61,6 +61,7 @@ def style(style, allowed):
     "stroke-opacity",
     "stroke-width",
     "text-anchor",
+    "text-shadow",
     "-toyplot-anchor-shift",
     ])
 
