Fix error when generating AMD/UMD dependencies

Generating AMD/UMD dependencies lead to an error:

  $ bin/pegjs --format amd --dependency $:jquery examples/arithmetics.pegjs
  dependencyIds is not defined

  $ bin/pegjs --format umd --dependency $:jquery examples/arithmetics.pegjs
  dependencyIds is not defined

This commit fixes the problem, which was caused by a mistake done in
d2569b9.

lib/compiler/passes/generate-js.js

@@ -1275,7 +1275,7 @@ function generateJS(ast, options) {
 
       amd() {
         let dependencyVars = Object.keys(options.dependencies);
-        let dependencyIds = dependencyIds.map(v => options.dependencies[v]);
+        let dependencyIds = dependencyVars.map(v => options.dependencies[v]);
         let dependencies = "["
           + dependencyIds.map(
               id => "\"" + js.stringEscape(id) + "\""
@@ -1313,7 +1313,7 @@ function generateJS(ast, options) {
       umd() {
         let parts = [];
         let dependencyVars = Object.keys(options.dependencies);
-        let dependencyIds = dependencyIds.map(v => options.dependencies[v]);
+        let dependencyIds = dependencyVars.map(v => options.dependencies[v]);
         let dependencies = "["
           + dependencyIds.map(
               id => "\"" + js.stringEscape(id) + "\""