Fix parsing yield with dynamicImport (#383)

src/parser/expression.js

@@ -61,7 +61,7 @@ pp.getExpression = function() {
 // the AST node that the inner parser gave them in another node.
 
 // Parse a full expression. The optional arguments are used to
-// forbid the `in` operator (in for loops initalization expressions)
+// forbid the `in` operator (in for loops initialization expressions)
 // and provide reference for storing '=' operator inside shorthand
 // property assignment in contexts where both object expression
 // and object pattern might appear (so it's possible to raise
@@ -1095,7 +1095,11 @@ pp.parseAwait = function (node) {
 pp.parseYield = function () {
   const node = this.startNode();
   this.next();
-  if (this.match(tt.semi) || this.canInsertSemicolon() || (!this.match(tt.star) && !this.state.type.startsExpr)) {
+  if (
+    this.match(tt.semi) ||
+    this.canInsertSemicolon() ||
+    (!this.match(tt.star) && !this.state.type.startsExpr)
+  ) {
     node.delegate = false;
     node.argument = null;
   } else {

src/tokenizer/types.js

@@ -143,7 +143,7 @@ export const keywords = {
   "class": new KeywordTokenType("class"),
   "extends": new KeywordTokenType("extends", { beforeExpr }),
   "export": new KeywordTokenType("export"),
-  "import": new KeywordTokenType("import"),
+  "import": new KeywordTokenType("import", { startsExpr }),
   "yield": new KeywordTokenType("yield", { beforeExpr, startsExpr }),
   "null": new KeywordTokenType("null", { startsExpr }),
   "true": new KeywordTokenType("true", { startsExpr }),