Fix WASM compile test on CI (#972)

* Fix WASM compile test on CI

A transitive dependency updated `getrandom`.

* rustflags

Author: goto-bus-stop

.cargo/config.toml

@@ -3,4 +3,9 @@ xtask = "run --package xtask --"
 
 # circle seems to install cargo packages via ssh:// rather than https://
 [net]
-git-fetch-with-cli = true
+git-fetch-with-cli = true
+
+# WebAssembly support per https://docs.rs/getrandom/0.3.3/getrandom/#opt-in-backends
+# See examples/validation-wasm-demo/Cargo.toml
+[target.wasm32-unknown-unknown]
+rustflags = ['--cfg', 'getrandom_backend="wasm_js"']

examples/validation-wasm-demo/Cargo.toml

@@ -8,6 +8,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 apollo-compiler.path = "../../crates/apollo-compiler"
-# https://docs.rs/getrandom/0.2.15/getrandom/index.html#webassembly-support
-getrandom = { version = "0.2", features = ["js"] }
+# https://docs.rs/getrandom/0.3.3/getrandom/index.html#webassembly-support
+# Works together with the rustflags configuration in `.cargo/config.toml`
+getrandom = { version = "0.3", features = ["wasm_js"] }
 wasm-bindgen = "0.2.100"