ci(esplora): for wasm cargo check add feature dev-getrandom-wasm

.github/workflows/cont_integration.yml

@@ -101,7 +101,7 @@ jobs:
         run: cargo check --target wasm32-unknown-unknown --no-default-features --features bitcoin/no-std,miniscript/no-std,bdk_chain/hashbrown,dev-getrandom-wasm
       - name: Check esplora
         working-directory: ./crates/esplora
-        run: cargo check --target wasm32-unknown-unknown --no-default-features --features bitcoin/no-std,miniscript/no-std,bdk_chain/hashbrown,async
+        run: cargo check --target wasm32-unknown-unknown --no-default-features --features bitcoin/no-std,miniscript/no-std,bdk_chain/hashbrown,async,dev-getrandom-wasm
 
   fmt:
     name: Rust fmt

crates/esplora/Cargo.toml

@@ -21,6 +21,9 @@ futures = { version = "0.3.26", optional = true }
 bitcoin = { version = "0.30.0", optional = true, default-features = false }
 miniscript = { version = "10.0.0", optional = true, default-features = false }
 
+[target.'cfg(target_arch = "wasm32")'.dev-dependencies]
+getrandom = "0.2"
+
 [dev-dependencies]
 electrsd = { version= "0.25.0", features = ["bitcoind_25_0", "esplora_a33e97e1", "legacy"] }
 tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros"] }
@@ -31,3 +34,8 @@ std = ["bdk_chain/std"]
 async = ["async-trait", "futures", "esplora-client/async"]
 async-https = ["async", "esplora-client/async-https"]
 blocking = ["esplora-client/blocking"]
+
+# This feature is used to run `cargo check` in our CI targeting wasm. It's not recommended
+# for libraries to explicitly include the "getrandom/js" feature, so we only do it when
+# necessary for running our CI. See: https://docs.rs/getrandom/0.2.8/getrandom/#webassembly-support
+dev-getrandom-wasm = ["getrandom/js"]