Update gemspec dependencies and specs

[araccaine]

What

• Updates dependencies for development
• Fixes rspec not running any tests due to uninitialized constant Grape::Middleware::Base::Helpers error (see https://github.com/ruby-grape/grape/issues/1939 and this commit: https://github.com/luong-komorebi/grape_logging/commit/6196c6ba4fcdcebfba67559cc62b707d1dc5c8b9)

Notes

Spec GrapeLogging::Formatters::Rails#call exception data returns a string with a backtrace (in spec/lib/grape_logging/formatters/rails_spec.rb:32) still fails:

expected "\t/home/user/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/rspec-core-3.13.0/lib/rspec/core/example.rb:263:in `instance_exec'" to include "grape_logging"

  0) GrapeLogging::Formatters::Rails#call exception data returns a string with a backtrace
     Failure/Error: expect(lines[1]).to include 'grape_logging'
       expected "\t/home/user/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/rspec-core-3.13.0/lib/rspec/core/example.rb:263:in `instance_exec'" to include "grape_logging"
     # ./spec/lib/grape_logging/formatters/rails_spec.rb:40:in `block (4 levels) in <top (required)>'