Update sentry-sidekiq for Sidekiq 7.1.5

In sidekiq/sidekiq#6051, Sidekiq changed the
expected parameters on the error handler. However, because it assumes
error handler to be a Proc, it uses `#arity` for checking the number of
parameters. This is not compatible with our error handler, which is a
class.

sentry-sidekiq/Gemfile

@@ -16,11 +16,13 @@ gem "rexml"
 gem "loofah", "2.20.0" if RUBY_VERSION.to_f < 2.5
 
 sidekiq_version = ENV["SIDEKIQ_VERSION"]
-sidekiq_version = "6.0" if sidekiq_version.nil?
+sidekiq_version = "7.0" if sidekiq_version.nil?
 
 gem "sidekiq", "~> #{sidekiq_version}"
 gem "rails"
 
+gem "ruby-lsp-rspec"
+
 if RUBY_VERSION.to_f >= 2.6
   gem "debug", github: "ruby/debug", platform: :ruby
   gem "irb"

sentry-sidekiq/lib/sentry/sidekiq/error_handler.rb

@@ -29,6 +29,10 @@ def call(ex, context)
         scope&.clear
       end
 
+      def arity
+        method(:call).arity
+      end
+
       private
 
       def retryable?(context)

sentry-sidekiq/spec/sentry/sidekiq/sentry_context_middleware_spec.rb

@@ -140,11 +140,11 @@
 
       q = queue.to_a
       expect(q.size).to be(2)
-      first_headers = q.first["trace_propagation_headers"]
+      first_headers = q[0]["trace_propagation_headers"]
       expect(first_headers["sentry-trace"]).to eq(transaction.to_sentry_trace)
       expect(first_headers["baggage"]).to eq(transaction.to_baggage)
 
-      second_headers = q.second["trace_propagation_headers"]
+      second_headers = q[1]["trace_propagation_headers"]
       expect(second_headers["sentry-trace"]).to eq(transaction.to_sentry_trace)
       expect(second_headers["baggage"]).to eq(transaction.to_baggage)
     end