fix: cln msrv

crates/cdk-cln/README.md

@@ -0,0 +1,16 @@
+
+## Minimum Supported Rust Version (MSRV)
+
+The `cdk-cln` library should always compile with any combination of features on Rust **1.63.0**.
+
+To build and test with the MSRV you will need to pin the below dependency versions:
+
+```shell
+cargo update -p half --precise 2.2.1
+cargo update -p tokio --precise 1.38.1
+cargo update -p tokio-util --precise 0.7.11
+cargo update -p reqwest --precise 0.12.4
+cargo update -p serde_with --precise 3.1.0
+cargo update -p regex --precise 1.9.6
+cargo update -p backtrace --precise 0.3.58
+```

flake.nix

@@ -124,6 +124,7 @@
               ${_shellHook}
               cargo update -p half --precise 2.2.1
               cargo update -p tokio --precise 1.38.1
+              cargo update -p tokio-util --precise 0.7.11
               cargo update -p reqwest --precise 0.12.4
               cargo update -p serde_with --precise 3.1.0
               cargo update -p regex --precise 1.9.6