use export_statement when exporting expressions

Author: resolritter

common/corpus/declarations.txt

@@ -303,10 +303,13 @@ Export assignments
 ==================================
 
 export = Linter;
+export = {};
 
 ---
 
-(program (export_statement (identifier)))
+(program
+  (export_statement (identifier))
+  (export_statement (object)))
 
 ==================================
 Import aliases

common/define-grammar.js

@@ -273,8 +273,8 @@ module.exports = function defineGrammar(dialect) {
 
       export_statement: ($, previous) => choice(
         previous,
-        seq('export', 'type', $.export_clause),
-        seq('export', '=', $.identifier, $._semicolon),
+        seq('export', 'type', $.export_clause, $._semicolon),
+        seq('export', '=', $.expression, $._semicolon),
         seq('export', 'as', 'namespace', $.identifier, $._semicolon),
       ),