Update gemspec

uplot.gemspec

@@ -1,29 +1,26 @@
 require_relative 'lib/uplot/version'
 
 Gem::Specification.new do |spec|
-  spec.name          = "uplot"
+  spec.name          = 'uplot'
   spec.version       = Uplot::VERSION
-  spec.authors       = ["kojix2"]
-  spec.email         = ["2xijok@gmail.com"]
+  spec.authors       = ['kojix2']
+  spec.email         = ['2xijok@gmail.com']
 
-  spec.summary       = %q{TODO: Write a short summary, because RubyGems requires one.}
-  spec.description   = %q{TODO: Write a longer description or delete this line.}
-  spec.homepage      = "TODO: Put your gem's website or public repo URL here."
-  spec.license       = "MIT"
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+  spec.summary       = 'Create Ascii charts on your terminal'
+  spec.description   = 'Create Ascii charts on your terminal with pipeline'
+  spec.homepage      = 'https://github.com/kojix2/uplot'
+  spec.license       = 'MIT'
+  spec.required_ruby_version = Gem::Requirement.new('>= 2.3.0')
 
-  spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
-
-  spec.metadata["homepage_uri"] = spec.homepage
-  spec.metadata["source_code_uri"] = "TODO: Put your gem's public repo URL here."
-  spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
-
-  # Specify which files should be added to the gem when it is released.
-  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
+  spec.files = Dir.chdir(File.expand_path(__dir__)) do
     `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   end
-  spec.bindir        = "exe"
+  spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
-  spec.require_paths = ["lib"]
+  spec.require_paths = ['lib']
+
+  spec.add_runtime_dependency 'unicode_plot'
+  spec.add_development_dependency 'bundler'
+  spec.add_development_dependency 'rake'
+  spec.add_development_dependency 'test-unit'
 end