Fix tests. 'const' not available

Author: mtraynham

colorbrewer/colorbrewer-tests.ts

@@ -1,8 +1,8 @@
 /// <reference path="./colorbrewer.d.ts" />
 
-const accent3: string[] = colorbrewer.Accent[3];
-const accent4: string[] = colorbrewer.Accent[4];
-const accent5: string[] = colorbrewer.Accent[5];
-const accent6: string[] = colorbrewer.Accent[6];
-const accent7: string[] = colorbrewer.Accent[7];
-const accent8: string[] = colorbrewer.Accent[8];
+var accent3: string[] = colorbrewer.Accent[3];
+var accent4: string[] = colorbrewer.Accent[4];
+var accent5: string[] = colorbrewer.Accent[5];
+var accent6: string[] = colorbrewer.Accent[6];
+var accent7: string[] = colorbrewer.Accent[7];
+var accent8: string[] = colorbrewer.Accent[8];