Update rustc errors for new stable release

Author: alexcrichton

crates/macro/ui-tests/missing-catch.stderr

@@ -1,5 +1,5 @@
-error[E0277]: the trait bound `std::result::Result<wasm_bindgen::JsValue, wasm_bindgen::JsValue>: wasm_bindgen::convert::traits::FromWasmAbi` is not satisfied
+error[E0277]: the trait bound `std::result::Result<wasm_bindgen::JsValue, wasm_bindgen::JsValue>: wasm_bindgen::convert::FromWasmAbi` is not satisfied
  --> $DIR/missing-catch.rs:6:9
   |
 6 |     pub fn foo() -> Result<JsValue, JsValue>;
-  |            ^^^ the trait `wasm_bindgen::convert::traits::FromWasmAbi` is not implemented for `std::result::Result<wasm_bindgen::JsValue, wasm_bindgen::JsValue>`
+  |            ^^^ the trait `wasm_bindgen::convert::FromWasmAbi` is not implemented for `std::result::Result<wasm_bindgen::JsValue, wasm_bindgen::JsValue>`

crates/macro/ui-tests/traits-not-implemented.stderr

@@ -1,5 +1,5 @@
-error[E0277]: the trait bound `A: wasm_bindgen::convert::traits::IntoWasmAbi` is not satisfied
+error[E0277]: the trait bound `A: wasm_bindgen::convert::IntoWasmAbi` is not satisfied
  --> $DIR/traits-not-implemented.rs:8:12
   |
 8 |     pub fn foo(a: A);
-  |            ^^^ the trait `wasm_bindgen::convert::traits::IntoWasmAbi` is not implemented for `A`
+  |            ^^^ the trait `wasm_bindgen::convert::IntoWasmAbi` is not implemented for `A`

crates/macro/ui-tests/unknown-type-in-import.stderr

@@ -2,4 +2,6 @@ error[E0412]: cannot find type `A` in this scope
  --> $DIR/unknown-type-in-import.rs:6:19
   |
 6 |     pub fn foo(a: A);
-  |                   ^ not found in this scope
+  |               -   ^ not found in this scope
+  |               |
+  |               help: you might be missing a type parameter: `<A>`