Update png dependency

linkmauve · linkmauve · commit 6fa8eda28faf · 2020-04-09T17:42:37.000+02:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -15,7 +15,7 @@ byteorder = "1.0"
 rayon = { version = "1.0", optional = true }
 
 [dev-dependencies]
-png = "0.15"
+png = "0.16"
 walkdir = "2.0"
 criterion = "0.3"
 
