Update podspec

Author: sambae

StyledText.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'StyledText'
-  s.version          = '1.3.0'
+  s.version          = '1.4.0'
   s.summary          = 'Declarative text styles and simple Dynamic Type support for iOS'
   s.description      = <<-DESC
                         StyledText is a library that simplifies styling dynamic text in iOS applications. Instead of having to use attributed strings every time you need to update text, you can declaratively set a text style on your labels. When the text of the label is updated, the label uses the preset style.
@@ -9,8 +9,8 @@ Pod::Spec.new do |s|
   s.license          = { :type => 'MIT', :file => 'LICENSE' }
   s.author           = { 'huebnerob' => '[email protected]' }
   s.source           = { :git => 'https://github.com/blueapron/styled-text.git', :tag => 'v' + s.version.to_s }
-  s.ios.deployment_target = '10.0'
-  s.swift_version = '5.0'
+  s.ios.deployment_target = '12.0'
+  s.swift_version = '5.7'
   s.source_files = 'Sources/StyledText/Classes/**/*'
   s.frameworks = 'UIKit'
 end