Increase credo's max nesting threshold from 2 to 3 because this is bs

Author: zoldar

.credo.exs

@@ -128,7 +128,7 @@
           {Credo.Check.Refactor.MapJoin, []},
           {Credo.Check.Refactor.NegatedConditionsInUnless, []},
           {Credo.Check.Refactor.NegatedConditionsWithElse, false},
-          {Credo.Check.Refactor.Nesting, []},
+          {Credo.Check.Refactor.Nesting, [max_nesting: 3]},
           {Credo.Check.Refactor.UnlessWithElse, []},
           {Credo.Check.Refactor.WithClauses, []},
           {Credo.Check.Refactor.FilterFilter, []},