prepare for release 3.1.4

CHANGELOG.md

+## 3.1.4
+
+- [pr-1239](https://github.com/CosmicMind/Material/pull/1239): Fixed regression with intrinsic content sizing in Switch control. 
+- [pr-1240](https://github.com/CosmicMind/Material/pull/1240): Fixed prepare method called twice.
+  - [issue-1215](https://github.com/CosmicMind/Material/issues/1215): prepare() is called twice on NavigationDrawerController.
+  
 ## 3.1.3
 
 * Added installation instructions to README.

Material.podspec

 Pod::Spec.new do |s|
 	s.name = 'Material'
-	s.version = '3.1.3'
+	s.version = '3.1.4'
 	s.swift_version = '5.0'
 	s.license = 'BSD-3-Clause'
 	s.summary = 'A UI/UX framework for creating beautiful applications.'

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>3.1.3</string>
+	<string>3.1.4</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>