Add a password rule for ticketweb.com (#919)

Author: rmondello

quirks/password-rules.json

@@ -1019,6 +1019,9 @@
     "thameswater.co.uk": {
         "password-rules": "minlength: 8; maxlength: 16; required: lower; required: upper; required: digit; required: special;"
     },
+    "ticketweb.com": {
+        "password-rules": "minlength: 12; maxlength: 15;"
+    },
     "tix.soundrink.com": {
         "password-rules": "minlength: 6; maxlength: 16;"
     },