Upgrade gibberish gem.

Resolves Digest::Digest deprecation warning.

[#75227366]
Signed-off-by: Corey Innis <cinnis@pivotal.io>

Gemfile.lock

@@ -27,7 +27,7 @@ PATH
   remote: bosh-core
   specs:
     bosh-core (1.2941.0)
-      gibberish (~> 1.2.0)
+      gibberish (~> 1.4.0)
       yajl-ruby (~> 1.2.0)
 
 PATH
@@ -367,7 +367,7 @@ GEM
       fog-core
       nokogiri (~> 1.5, >= 1.5.11)
     formatador (0.2.5)
-    gibberish (1.2.2)
+    gibberish (1.4.0)
     highline (1.6.21)
     httpclient (2.4.0)
     inflecto (0.0.2)

bosh-core/bosh-core.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = %w[lib]
 
-  spec.add_dependency 'gibberish', '~>1.2.0'
+  spec.add_dependency 'gibberish', '~>1.4.0'
   spec.add_dependency 'yajl-ruby', '~>1.2.0'
 
   spec.add_development_dependency 'rspec', '~> 3.0'

bosh-core/spec/bosh/encryption_handler_spec.rb

@@ -125,7 +125,7 @@ module Bosh::Core
       handler = EncryptionHandler.new('client_id', @credentials)
       expect {
         handler.decrypt('f')
-      }.to raise_error(EncryptionHandler::DecryptionError, /TypeError/)
+      }.to raise_error(EncryptionHandler::DecryptionError, /ArgumentError/)
 
       expect {
         handler.decrypt('fddddddddddddddddddddddddddddddddddddddddddddddddd')