Upgrade optimist dependency to minimist

bin/gamedig.js

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 
-var argv = require('optimist').argv;
+var argv = require('minimist')(process.argv.slice(2));
+console.log(argv);
 
 var debug = argv.debug;
 delete argv.debug;

package.json

@@ -32,7 +32,7 @@
 		"compressjs": "~1.0.1",
 		"gbxremote": "~0.1.4",
 		"request": "~2.33.0",
-		"optimist": "~0.6.0",
+		"minimist": "~1.1.0",
 		"varint": "~4.0.0",
 		"moment": "~2.9.0"
 	},