Update criterion to 0.8.1.

Author: dcampbell24

plotters-bitmap/Cargo.toml

@@ -35,7 +35,7 @@ features = ["ttf", "line_series", "bitmap_backend"]
 path = "../plotters"
 
 [dev-dependencies]
-criterion = "0.5.1"
+criterion = "0.8.1"
 rayon = "1.5.1"
 
 [[bench]]

plotters/Cargo.toml

@@ -121,7 +121,7 @@ deprecated_items = [] # Keep some of the deprecated items for backward compatibi
 
 [dev-dependencies]
 itertools = "0.14.0"
-criterion = "0.5.1"
+criterion = "0.8.1"
 rayon = "1.5.1"
 serde_json = "1.0.82"
 serde_derive = "1.0.140"