The resolver version must be set at the workspace level.
See: https://blog.rust-lang.org/2021/03/25/Rust-1.51.0.html#cargos-new-feature-resolver
[workspace]
+resolver = "2"
members = [
"crates/bdk",
"crates/chain",
bitcoin = { version = "0.30.0", optional = true, default-features = false }
miniscript = { version = "10.0.0", optional = true, default-features = false }
-[dev-dependencies]
+[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
electrsd = { version= "0.25.0", features = ["bitcoind_25_0", "esplora_a33e97e1", "legacy"] }
tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros"] }