bump `MSRV` to 1.70.0

It would be better to have a lower MSRV.
However I would like to whole workspace to have the same version,
and uniffi requires at least 1.70.0

crates/cashu-sdk/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 authors = ["thesimplekid"]
 homepage.workspace = true
 repository.workspace = true
-rust-version = "1.67.0" # MSRV
+rust-version.workspace = true # MSRV
 license.workspace = true
 
 

crates/cashu/Cargo.toml

@@ -7,7 +7,7 @@ readme = "README.md"
 homepage.workspace = true
 repository.workspace = true
 license.workspace = true
-rust-version = "1.67.0" # MSRV
+rust-version.workspace = true # MSRV
 description = "Cashu rust wallet and mint library"
 
 

justfile

@@ -9,7 +9,7 @@ precommit:
 	cargo test -p cashu
 	cargo test -p cashu-sdk
 	cargo clippy
-	rustup default 1.67.0
+	rustup default 1.70.0
 	cargo check -p cashu
 	cargo check -p cashu-sdk --no-default-features --features mint
 	cargo check -p cashu-sdk --no-default-features --features wallet