Adds stringify_map/1

[vrcca]

Implements #3

TODO

• write tests for expected output
• implement stringify_map/1 to stringify both Map and Struct data types
• accept map of arbitrary depth/nesting and flatten it to a single level using flatten_map/1 function Flatten Map of Arbitrary Depth #2
• publish new version of package to hex.pm

[codecov]

Codecov Report

Merging #4 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master        #4   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           11        12    +1     
=========================================
+ Hits            11        12    +1     

Impacted Files	Coverage Δ
lib/useful.ex	100.00% <100.00%> (ø)

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[nelsonic]

@vrcca implementation of stringify_map/1 looks good. 👍
If anything we should try and add more test cases in the future. 💡
Thanks for this PR. 🚀

[nelsonic]

@vrcca new version published to Hex.pm: https://hex.pm/packages/useful/0.3.0 contains stringify_map/1 📦

[vrcca]

Thanks!

[vrcca]

@nelsonic Would you mind adding hacktoberfest-accepted to this PR? Or making the project hacktoberfest enabled?

[nelsonic]

@nelsonic do I need to create a new label for that?
(I thought hacktoberfest automatically picked up on merged PRs ...)

[th0mas]

Seems not anymore, https://hacktoberfest.digitalocean.com/hacktoberfest-update

[vrcca]

They updated the rules recently to stop spammers from sending useless PRs.

[nelsonic]

Thanks for confirming @th0mas 🙌

[nelsonic]

Thanks again for the contribution. 🥇