calling the -s option without a token fails

[graysky2]

When using the rust-built binary, calling it without a token ends in an error

% j -s
error: a value is required for '--stat <stat>' but none was supplied

For more information, try '--help'.

When calling the python version, no error is present:

% j -s
0.0:	/run
10.0:	/usr/share/fonts
...
109577.6:	/scratch
________________________________________

167881:	 total weight
1018:	 number of entries
109577.58:	 current directory weight

data:	 /home/facade/.local/share/autojump/autojump.txt

[th1nk3r-ing]

the same with --purge options, this is more to use.

[th1nk3r-ing]

i see the PR in #250 fix this.
please update & do a release.
thanks.