Fix Unable to determine VERSION (#1729)

* Add additional files into gemspec

* Remove un-needed files

* Add changelog update

Author: luke-hill

CHANGELOG.md

@@ -10,6 +10,9 @@ Please visit [cucumber/CONTRIBUTING.md](https://github.com/cucumber/cucumber/blo
 
 ## [Unreleased]
 
+### Fixed
+- Cucumber was unable to generate the correct `VERSION` constant ([PR#1729](https://github.com/cucumber/cucumber-ruby/pull/1729) [luke-hill](https://github.com/luke-hill))
+
 ## [9.0.0] - 2023-08-31
 ### Added
 - Add option `--retry-total` ([#1669](https://github.com/cucumber/cucumber-ruby/pull/1669))
@@ -20,8 +23,6 @@ Please visit [cucumber/CONTRIBUTING.md](https://github.com/cucumber/cucumber/blo
 with [mini_mime](https://rubygems.org/gems/mini_mime)
 ([#1695](https://github.com/cucumber/cucumber-ruby/pull/1695))
 
-### Deprecated
-
 ### Fixed
 - Cucumber may raise NoMethodError when CUCUMBER_COLORS environment was set ([PR#1641](https://github.com/cucumber/cucumber-ruby/pull/1641/) [s2k](https://github.com/s2k))
 

cucumber.gemspec

@@ -53,10 +53,9 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = '>= 3.0.1'
   s.files = Dir[
-    'CHANGELOG.old.md',
-    'CONTRIBUTING.md',
     'README.md',
     'LICENSE',
+    'VERSION',
     'lib/**/*'
   ]
   s.executables      = ['cucumber']