[dynamic-import] Implementing import() syntax (#163)

src/parser/statement.js

@@ -98,6 +98,8 @@ pp.parseStatement = function (declaration, topLevel) {
     case tt.semi: return this.parseEmptyStatement(node);
     case tt._export:
     case tt._import:
+      if (this.hasPlugin("dynamicImport") && this.lookahead().type === tt.parenL) break;
+
       if (!this.options.allowImportExportEverywhere) {
         if (!topLevel) {
           this.raise(this.state.start, "'import' and 'export' may only appear at the top level");