Merge pull request #1414 from puppetlabs/json_fix

(BUGFIX) Exclude newest JSON version

Author: LukasAud

pdk.gemspec

@@ -47,6 +47,7 @@ Gem::Specification.new do |spec|
   # Other deps
   spec.add_runtime_dependency 'deep_merge', '~> 1.2.2'
   spec.add_runtime_dependency 'diff-lcs', '>= 1.5.0'
+  spec.add_runtime_dependency 'json', '< 2.8.0'
   spec.add_runtime_dependency 'pathspec', '~> 1.1'
   spec.add_runtime_dependency 'puppet_forge', '~> 5.0'