bump svg-graph

Gemfile

@@ -93,7 +93,7 @@ gem 'semantic', '~> 1.6.1'
 
 # generates SVG Graphs
 # used for statistics on svn repositories
-gem 'svg-graph', '~> 2.1.0'
+gem 'svg-graph', '~> 2.2.0'
 
 gem 'date_validator', '~> 0.9.0'
 gem 'ruby-duration', '~> 3.2.0'

Gemfile.lock

@@ -911,7 +911,7 @@ GEM
     stackprof (0.2.15)
     stringex (2.8.5)
     structured_warnings (0.4.0)
-    svg-graph (2.1.3)
+    svg-graph (2.2.0)
     swd (1.1.2)
       activesupport (>= 3)
       attr_required (>= 0.0.5)
@@ -1135,7 +1135,7 @@ DEPENDENCIES
   sprockets (~> 3.7.0)
   stackprof
   stringex (~> 2.8.5)
-  svg-graph (~> 2.1.0)
+  svg-graph (~> 2.2.0)
   sys-filesystem (~> 1.3.3)
   table_print (~> 1.5.6)
   test-prof (~> 0.12.0)