[loose parser] Consume semicolons after export-all statements

FIX: Fix a bug that caused semicolons after `export *` statements to be
parsed as empty statements.

Closes #1082

Author: marijnh

acorn-loose/src/statement.js

@@ -461,6 +461,7 @@ lp.parseExport = function() {
       }
     }
     node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString()
+    this.semicolon()
     return this.finishNode(node, "ExportAllDeclaration")
   }
   if (this.eat(tt._default)) {

test/tests-export-all-as-ns-from-source.js

@@ -85,6 +85,19 @@ test("export * from \"source\"", {
   "sourceType": "module"
 }, { sourceType: "module", ecmaVersion: 11 })
 
+test("export * from 'a';", {
+  type: "Program",
+  body: [
+    {
+      type: "ExportAllDeclaration",
+      exported: null,
+      source: {
+        type: "Literal",
+      }
+    }
+  ]
+}, {sourceType: "module", ecmaVersion: 11})
+
 testFail("export * as ns from \"source\"", "'import' and 'export' may appear only with 'sourceType: module' (1:0)", { sourceType: "script", ecmaVersion: 11 })
 testFail("export * as ns from \"source\"", "Unexpected token (1:9)", { sourceType: "module", ecmaVersion: 10 })
 testFail("export * as ns", "Unexpected token (1:14)", { sourceType: "module", ecmaVersion: 11 })