Temporary fix for CI

Author: phimuemue

Cargo.toml

@@ -25,7 +25,7 @@ either = { version = "1.0", default-features = false }
 
 [dev-dependencies]
 rand = "0.7"
-criterion = "0.3"
+criterion = "=0.3.0" # TODO update criterion version once it becomes compatible with our minimum required Rust verision or bump minimum required rust version
 
 [dev-dependencies.quickcheck]
 version = "0.9"