make 2021 the default edition

Author: lqd

ui/frontend/reducers/configuration.ts

@@ -42,7 +42,7 @@ const DEFAULT: State = {
   primaryAction: PrimaryActionAuto.Auto,
   channel: Channel.Stable,
   mode: Mode.Debug,
-  edition: Edition.Rust2018,
+  edition: Edition.Rust2021,
   backtrace: Backtrace.Disabled,
 };
 

ui/frontend/selectors/index.ts

@@ -122,7 +122,7 @@ export const getChannelLabel = (state: State) => {
 
 export const isEditionDefault = createSelector(
   editionSelector,
-  edition => edition == Edition.Rust2018,
+  edition => edition == Edition.Rust2021,
 );
 
 export const getBacktraceSet = (state: State) => (