Deps: bump and lock in

squib.gemspec

@@ -29,15 +29,15 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(/^(spec|samples|docs|benchmarks)\//)
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'cairo',                 '~> 1.15.5'
-  spec.add_runtime_dependency 'gio2',                  '~> 3.1.1'
-  spec.add_runtime_dependency 'gobject-introspection', '~> 3.1.1'
+  spec.add_runtime_dependency 'cairo',                 '1.15.8'
+  spec.add_runtime_dependency 'gio2',                  '3.1.4'
+  spec.add_runtime_dependency 'gobject-introspection', '3.1.4'
   spec.add_runtime_dependency 'mercenary',             '~> 0.3.4'
-  spec.add_runtime_dependency 'nokogiri',              '~> 1.7.0'
-  spec.add_runtime_dependency 'pango',                 '~> 3.1.1'
-  spec.add_runtime_dependency 'roo',                   '~> 2.7.0'
-  spec.add_runtime_dependency 'rsvg2',                 '~> 3.1.1'
-  spec.add_runtime_dependency 'ruby-progressbar',      '~> 1.8'
+  spec.add_runtime_dependency 'nokogiri',              '~> 1.7.2'
+  spec.add_runtime_dependency 'pango',                 '3.1.4'
+  spec.add_runtime_dependency 'roo',                   '~> 2.7.1'
+  spec.add_runtime_dependency 'rsvg2',                 '3.1.4'
+  spec.add_runtime_dependency 'ruby-progressbar',      '~> 1.8.1'
 
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'rake'