Subject: drop wasm-bindgen-test

The "version" crate isn't available in Debian, and we're not targeting
wasm closely, so it's simplest to drop this for now.

Index: chrono/Cargo.toml
===================================================================
--- chrono.orig/Cargo.toml
+++ chrono/Cargo.toml
@@ -160,3 +160,0 @@
-[target.'cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))'.dev-dependencies.wasm-bindgen-test]
-version = "0.3"
-