Add infrastructure to sign sidekiq gem releases

.public_cert.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDMDCCAhigAwIBAgIBADANBgkqhkiG9w0BAQUFADA+MRAwDgYDVQQDDAdtcGVy
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+ey6hlw==
+-----END CERTIFICATE-----

sidekiq.gemspec

@@ -14,6 +14,8 @@ Gem::Specification.new do |gem|
   gem.name          = "sidekiq"
   gem.require_paths = ["lib"]
   gem.version       = Sidekiq::VERSION
+  gem.signing_key   = File.expand_path('~/.ssh/gem-private_key.pem')
+  gem.cert_chain    = ['.public_cert.pem']
   gem.add_dependency                  'redis', '~> 3'
   gem.add_dependency                  'redis-namespace'
   gem.add_dependency                  'connection_pool', '~> 1.0'