History limit removes the newest command, not the oldest

[RReverser]

This:

https://github.com/wavesoft/local-echo/blob/8d0b7f55c5cf4b0b5f7c5132825dc5bd984bf017/lib/HistoryController.js#L22-L24

should've been using .shift(). Instead, current behaviour keeps pushing one item into the history and immediately popping it back, so that once limit is reached, no history items are stored.