Update ascii-chart to get patch for '.' character

'.' character wasn't displaying in Chrome on Android.

package.json

@@ -4,7 +4,7 @@
   "description": "Explore the Tor network without JS",
   "main": "index.js",
   "dependencies": {
-    "ascii-chart": "^1.2.0",
+    "ascii-chart": "^1.3.0",
     "compression": "^1.6.2",
     "express": "^4.14.0",
     "express-minify": "^0.2.0",