Moved Babel options to .babelrc

.babelrc

@@ -0,0 +1,15 @@
+{
+    "comments": false,
+    "compact": false,
+    "presets": [
+        [
+            "env",
+            {
+                "modules": false,
+                "targets": {
+                    "ie": 9
+                }
+            }
+        ]
+    ]
+}

gulpfile.js

@@ -74,7 +74,7 @@ task( "build:browser", () => {
     `;
 
     return browserify( "lib/peg.js", { standalone: "peg" } )
-        .transform( babelify, { presets: "env", compact: false } )
+        .transform( babelify )
         .bundle()
         .pipe( source( "peg.js" ) )
         .pipe( header( HEADER ) )

test/server/run

@@ -17,13 +17,8 @@ app.use( "/examples", express.static( `${ __dirname }/../../examples` ) );
 
 app.get( "/:dir/bundle.js", ( req, res ) => {
 
-    browserify( glob.sync(
-        `${ __dirname }/../${ req.params.dir }/**/*.js`
-    ) )
-        .transform( babelify, {
-            presets: "env",
-            compact: false
-        } )
+    browserify( glob.sync( `${ __dirname }/../${ req.params.dir }/**/*.js` ) )
+        .transform( babelify )
         .bundle()
         .pipe( res );