add sort function

[rmacciuci]

[isacikgoz]

@rmacciuci Thanks for the contribution 🚀 Would you mind a brief PR description for future documentation? Thanks!

[yakuter]

Also @rmacciuci some extra tests would be nice for string and structs sorting (by struct field). This way we can show people how to use this function.

[codecov[bot]]

Codecov Report

Merging #8 (093129b) into master (cb0e5d9) will increase coverage by 1.05%. The diff coverage is 100.00%.

:exclamation: Current head 093129b differs from pull request most recent head 69d526e. Consider uploading reports for the commit 69d526e to get more accurate results

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
+ Coverage   95.00%   96.05%   +1.05%     
==========================================
  Files           1        1              
  Lines          60       76      +16     
==========================================
+ Hits           57       73      +16     
  Misses          2        2              
  Partials        1        1              

Impacted Files	Coverage Δ
slices.go	96.05% <100.00%> (+1.05%)	:arrow_up:

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