[vintage] Can't delete colon when in "insert mode"

[ShaunDychko]

When using "insert mode" with the "vintage" package, it isn't possible to delete a colon after a property when it's immediately followed by a semi-colon. If you try, the bar at the bottom of Sublime Text presents the message "Unable to Open". In the following example, the colon after background can't be deleted without changing to "command mode", or by typing something after the colon, then coming back to delete it.

.my-selector {
  background:[caret-position];
}

Maybe this issue, and this one: #46
would both be solved by not automatically inserting a semi-colon after a colon. Is there a way to configure that in settings?