Fixed issue with broken xdg 2.2.4 gem

xdg bumped their gem version and broke the CLI in the process. This
change pins us to the last known working version (2.2.3) until we find a
better path forward and bumps the version to v6.2.1

Bug: #243

Author: sgnn7

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 6.2.1
+
+* Pin to xdg gem v2.2.3 due to a [crashing CLI](https://github.com/cyberark/conjur-cli/issues/243).
+
 # 6.2.0
 
 * Add `ldap-sync` subcommand.

VERSION

@@ -1 +1 @@
-6.1.1
+6.2.1

conjur-cli.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'highline', '~> 1.7'
   gem.add_dependency 'netrc', '~> 0.10'
   gem.add_dependency 'deep_merge', '~> 1.0'
-  gem.add_dependency 'xdg', '~> 2.2'
+  gem.add_dependency 'xdg', '= 2.2.3'
   gem.add_dependency 'table_print', '~> 1.5'
 
   gem.add_development_dependency 'rspec', '~> 3.0'