set up version 4.0.3

Author: bosborn

CHANGELOG.md

@@ -4,6 +4,10 @@ Adheres to [Semantic Versioning](http://semver.org/).
 
 ---
 
+## 4.0.3 (TBD)
+
+* TBD
+
 ## [4.0.2](https://github.com/ngageoint/tiff-ios/releases/tag/4.0.2) (11-06-2023)
 
 * Module definition

tiff-ios.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'tiff-ios'
-  s.version          = '4.0.2'
+  s.version          = '4.0.3'
   s.license          =  {:type => 'MIT', :file => 'LICENSE' }
   s.summary          = 'iOS SDK for Tagged Image File Format'
   s.homepage         = 'https://github.com/ngageoint/tiff-ios'