[Feature] Add helpers

[titouanmathis]

Changelog

Added

• Helpers:
  • Add a RequestHelper class (#25)
  • Add a request(): Request function based on symfony/http-foundation (#25)
  • Add an EnvHelper class (#25)
  • Add an env( string $key ): string function (#25)

To-do

• Add tests
• Update docs

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (46422ad) 64.37% compared to head (f4c46ce) 62.93%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #25      +/-   ##
=============================================
- Coverage      64.37%   62.93%   -1.45%     
- Complexity       152      155       +3     
=============================================
  Files              7       10       +3     
  Lines            393      402       +9     
=============================================
  Hits             253      253              
- Misses           140      149       +9     

Flag	Coverage Δ
unittests	62.93% <0.00%> (-1.45%)	⬇️

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Files	Coverage Δ
src/functions.php	0.00% <0.00%> (ø)
src/Helpers/EnvHelper.php	0.00% <0.00%> (ø)
src/Helpers/RequestHelper.php	0.00% <0.00%> (ø)

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[titouanmathis]

Added in #26.