specify rust-version

Author: hanabi1224

codetable/Cargo.toml

@@ -5,6 +5,7 @@ version = "0.2.1"
 repository = { workspace = true }
 license = { workspace = true }
 edition = { workspace = true }
+rust-version = "1.81"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

derive-impl/Cargo.toml

@@ -6,6 +6,7 @@ description = "Internal proc-macro crate for the MultihashDigest derive"
 repository = { workspace = true }
 license = { workspace = true }
 edition = { workspace = true }
+rust-version = "1.81"
 
 [lib]
 proc-macro = true

derive/Cargo.toml

@@ -5,6 +5,7 @@ description = "Proc macro for deriving custom multihash tables."
 repository = { workspace = true }
 license = { workspace = true }
 edition = { workspace = true }
+rust-version = "1.81"
 
 [features]
 default = ["std"]