Cryptographically sign gem

- Sign the gem following the guide on rubygems.org.
- Fixes #1.

CHANGELOG.md

@@ -1,5 +1,18 @@
-# Changelog
+# Change Log
 
-## v0.1.0 (2015-03-21)
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning][semver].
+
+## [Unreleased]
+
+## [0.2.0] - 2015-11-29
+
+- Cryptographically sign gem.
+
+## 0.1.0 - 2015-03-21
 
 - Initial release.
+
+[Unreleased]: https://github.com/mnuessler/jekyll-asciinema/compare/v0.2.0...HEAD
+[0.2.0]: https://github.com/mnuessler/jekyll-asciinema/compare/v0.1.0...v0.2.0
+[semver]: https://semver.org

certs/mnuessler.pem

@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

jekyll-asciinema.gemspec

@@ -20,10 +20,13 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
+  spec.cert_chain  = ['certs/mnuessler.pem']
+  spec.signing_key = File.expand_path("~/.ssh/gem-private_key.pem") if $0 =~ /gem\z/
+
   spec.add_runtime_dependency "jekyll", ">= 2.0"
 
   spec.add_development_dependency "bundler", "~> 1.9"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.2"
-  spec.add_development_dependency "pry"
+  spec.add_development_dependency "pry", "~> 0"
 end