added toolchain (#166)

added rust-toolchain file in order to run `cargo build` outside of docker and use the right version as the docker image would ### Test Plan run `cargo build`and `rustup show`to view that the same settings as by the docker image are used
cowprotocol · May 2, 2022 · d0eed4b · d0eed4b
1 parent 3011d69
commit d0eed4b
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/rust-toolchain b/rust-toolchain
@@ -0,0 +1,4 @@
+[toolchain]
+channel = "stable"
+components = ["clippy", "rustfmt"]
+profile = "minimal"