Update Slovenian local

[oparex]

Current version of relativeTime in Slovenian locale is inconsistent for future and past together, it only works for the future. Past is changed to be more like "%s ago" in english. One is added to minute, hour, day, month and year to be consistent with other languages.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (5a79cc6) to head (a08de8c). Report is 199 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff            @@
##               dev     #1592   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          177       177           
  Lines         1989      1989           
  Branches       505       505           
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  Hits          1989      1989           

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[iamkun]

Maybe we could update sl.js locale like https://github.com/moment/moment/blob/develop/src/locale/sl.js

ref: https://github.com/iamkun/dayjs/blob/dev/src/locale/uk.js#L13

[oparex]

Even better!