Change default height from 100 to 1

The default height of 100 causes unwanted results with the "blank" space between EAN13 and EAN5 add-on codes in PDF rendering app wkhtmltopdf (which uses the Webkit browser). This problem goes away when the default is changed to 1.

src/options/defaults.js

@@ -1,6 +1,6 @@
 var defaults = {
 	width: 2,
-	height: 100,
+	height: 1,
 	format: "auto",
 	displayValue: true,
 	fontOptions: "",