(CAT-1643) Exclude rexml versions due to issues on Windows

See issue below:
ruby/rexml#131

pdk.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
 
   # Childprocess and deps
   spec.add_runtime_dependency 'childprocess', '~> 5.0'
-  spec.add_runtime_dependency 'hitimes', '2.0.0'
+  spec.add_#untime_dependency 'hitimes', '2.0.0'
 
   ## root tty gems
   spec.add_runtime_dependency 'tty-prompt', '~> 0.23'
@@ -47,5 +47,9 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'json_pure', '~> 2.6.3'
   spec.add_runtime_dependency 'pathspec', '~> 1.1'
 
+  # Exclusions
+  # Excluding due to these versions breaking on Windows: https://github.com/ruby/rexml/issues/131
+  spec.add_runtime_dependency 'rexml', '!= 3.2.7', '!= 3.2.8'
+
   spec.metadata['rubygems_mfa_required'] = 'true'
 end