ci: pin deps for 1.41.1

Author: apoelstra

Cargo.toml

@@ -40,7 +40,6 @@ rand_chacha = "0.3"
 serde_test = "1.0"
 serde_json = "1.0"
 serde_cbor = "0.8"   # older than latest version to support 1.41.1
-ryu = "<1.0.5"
 bincode = "1.3"
 base64 = "0.13.0"
 

contrib/test.sh

@@ -8,6 +8,16 @@ then
     alias cargo="cargo +$TOOLCHAIN"
 fi
 
+# Pin dependencies as required if we are using MSRV toolchain.
+if cargo --version | grep "1\.41"; then
+    # can be removed with elementsd 0.8.0
+    cargo update -p zip --precise 0.5.6
+    # 1.0.157 uses syn 2.0 which requires edition 2018
+    cargo update -p serde --precise 1.0.156
+    # 1.0.108 uses `matches!` macro so does not work with Rust 1.41.1, bad `syn` no biscuit.
+    cargo update -p syn --precise 1.0.107
+fi
+
 # Test without any features first
 cargo test --verbose --no-default-features
 # Then test with the default features