Paths containing colons break autocomplete

[aryzing]

Whenver a path has a colon, cmp-path stops working.

For example, given a log file in ./my/path/2022-08-22T10:00/log.txt, autocomplete will suggest every part of the path except log.txt,

INPUT                        SUGGESTION
./|                          -> my/
./my/|                       -> path/
./my/path/|                  -> 2022-08-22T10:00/
./my/path/2022-08-22T10:00/| -> (no suggestions from cmp-path)

[DWIAltonaAnalytics]

adding to this, if on windows starting a path with

C:/

does not start autocompletion, but

/

does

[DWIAltonaAnalytics]

PR #60 should fix this.