jquery-sparkline: bump to version 2.1

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/jquery-sparkline/jquery-sparkline.mk

@@ -1,4 +1,4 @@
-JQUERY_SPARKLINE_VERSION = 1.6
+JQUERY_SPARKLINE_VERSION = 2.1
 JQUERY_SPARKLINE_SITE = http://www.omnipotent.net/jquery.sparkline/$(JQUERY_SPARKLINE_VERSION)
 JQUERY_SPARKLINE_SOURCE = jquery.sparkline.min.js