Update podspec

CSV.swift.podspec

@@ -1,18 +1,18 @@
-Pod::Spec.new do |s|
-  s.name = 'CSV.swift'
-  s.version = '2.4.2'
-  s.license = 'MIT'
-  s.summary = 'CSV reading and writing library written in Swift.'
-  s.homepage = 'https://github.com/yaslab/CSV.swift'
-  s.authors = { 'Yasuhiro Hatta' => '[email protected]' }
-  s.source = { :git => 'https://github.com/yaslab/CSV.swift.git', :tag => s.version }
+Pod::Spec.new do |spec|
+  spec.name         = 'CSV.swift'
+  spec.version      = '2.4.2'
+  spec.license      = { :type => 'MIT' }
+  spec.homepage     = 'https://github.com/yaslab/CSV.swift'
+  spec.authors      = { 'Yasuhiro Hatta' => '[email protected]' }
+  spec.summary      = 'CSV reading and writing library written in Swift.'
+  spec.source       = { :git => 'https://github.com/yaslab/CSV.swift.git', :tag => spec.version }
+  spec.source_files = 'Sources/CSV/*.swift'
 
-  s.osx.deployment_target = '10.9'
-  s.ios.deployment_target = '8.0'
-  s.tvos.deployment_target = '9.0'
-  s.watchos.deployment_target = '2.0'
+  spec.ios.deployment_target     = '8.0'
+  spec.tvos.deployment_target    = '9.0'
+  spec.watchos.deployment_target = '2.0'
+  spec.osx.deployment_target     = '10.9'
 
-  s.module_name = 'CSV'
-  s.swift_version = '5.0'
-  s.source_files = 'Sources/CSV/*.swift'
+  spec.module_name   = 'CSV'
+  spec.swift_version = '5.0'
 end