Upgrade to ruby 3.0.0 and rails 6.1.7.6

[Nicolas16]

No description provided.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01% ⚠️

Comparison is base (2e34e44) 98.52% compared to head (8cfe1e1) 98.52%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
- Coverage   98.52%   98.52%   -0.01%     
==========================================
  Files          89       89              
  Lines        4277     4276       -1     
==========================================
- Hits         4214     4213       -1     
  Misses         63       63              

Files Changed	Coverage Δ
app/controllers/actualities_controller.rb	100.00% <100.00%> (ø)
app/controllers/categories_controller.rb	100.00% <100.00%> (ø)
app/controllers/chapters_controller.rb	96.93% <100.00%> (ø)
app/controllers/colors_controller.rb	100.00% <100.00%> (ø)
app/controllers/contests_controller.rb	92.77% <100.00%> (ø)
app/controllers/privacypolicies_controller.rb	100.00% <100.00%> (ø)
app/controllers/sections_controller.rb	94.73% <100.00%> (ø)
app/controllers/starproposals_controller.rb	100.00% <100.00%> (ø)
app/controllers/suspicions_controller.rb	100.00% <100.00%> (ø)
app/controllers/users_controller.rb	99.20% <100.00%> (ø)
... and 3 more

... and 2 files with indirect coverage changes

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[blegat]

Pratique d'avoir des CI Unit Tests qui nous montrent que la voie est verte

[Nicolas16]

Indeed même si j'ai un peu galéré à les rendre verts :-)