Update dev dependencies

dev/Cargo.toml

@@ -7,12 +7,12 @@ publish = false
 
 [dev-dependencies]
 rusttype = { path = "../", features = ["gpu_cache"] }
-glium = "0.26"
+glium = "0.27"
 image = { version = "0.23", default-features = false, features = ["png"] }
 once_cell = "1"
 blake2 = "0.8"
 criterion = "0.3"
-ttf-parser = "0.4"
+ttf-parser = "0.5"
 
 [[bench]]
 name = "cache"