message: Fix tests on master
  This fixes an accidental regression from which was in turn an
  accidental regression from
diff: @@ -137,7 +137,12 @@ impl Fixture {
  crate-type = ["cdylib"]
  [dependencies]
  - wasm-bindgen = "0.2"
  + # Note that this uses and `=` dependency because there are
  + # various tests which assert that the version of wasm
  + # bindgen downloaded is what we expect, and if `=` is
  + # removed then it will download whatever the newest version
  + # of wasm-bindgen is which may not be what's listed here.
  + wasm-bindgen = "=0.2.37"
  [dev-dependencies]
  wasm-bindgen-test = "0.2"
  