Merge rust-analyzer/ungrammar#10

10: Allow type aliases in extern blocks r=jonas-schievink a=jonas-schievink

This is for the unstable feature #43467, which rustc uses internally

Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>

Author: bors[bot]

src/tools/rust-analyzer/lib/ungrammar/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "ungrammar"
 description = "A DSL for describing concrete syntax trees"
-version = "1.1.2"
+version = "1.1.3"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/matklad/ungrammar"
 authors = ["Aleksey Kladov <aleksey.kladov@gmail.com>"]

src/tools/rust-analyzer/lib/ungrammar/rust.ungram

@@ -250,6 +250,7 @@ ExternItem =
   Fn
 | MacroCall
 | Static
+| TypeAlias
 
 GenericParamList =
   '<' (GenericParam (',' GenericParam)* ','?)? '>'