write_xlsx.gemspec in write_xlsx-0.86.0 vs write_xlsx.gemspec in write_xlsx-0.87.0

@@ -8,19 +8,19 @@
   gem.version       = WriteXLSX_VERSION
   gem.authors       = ["Hideo NAKAMURA"]
   gem.email         = ["[e-mail]"]
   gem.description   = "write_xlsx is a gem to create a new file in the Excel 2007+ XLSX format."
   gem.summary       = "write_xlsx is a gem to create a new file in the Excel 2007+ XLSX format."
-  gem.homepage = "http://github.com/cxn03651/write_xlsx#readme"
+  gem.homepage      = "https://github.com/cxn03651/write_xlsx#readme"
   gem.license       = 'MIT'
 
   gem.files         = `git ls-files`.split($/)
   gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ["lib"]
   gem.add_runtime_dependency 'rubyzip', '>= 1.0.0'
   gem.add_runtime_dependency 'zip-zip'
-  gem.add_development_dependency 'test-unit'
+  gem.add_development_dependency 'minitest'
   gem.add_development_dependency 'rake'
   gem.extra_rdoc_files = [
     "LICENSE.txt",
     "README.md",
     "Changes"