queue null on command not found, stringify buffers
1.2.1
terminal signals
signal handling for ^C, ^D, backspace
send a new prompt following an empty line
1.3.0
remove a dep that was screwing up
overwrite backspaced-out characters with spaces but stop once the line buffer is empty
1.3.2
remove extra newline after empty lines
left and right arrows work
fix for spaces to work around the work-around in hypernal
work-arounds for spaces completely work now
mid-line backspace deletes work
special case for backspace deletes from the end
home and end keys work
delete key works
decode low-byte codes
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