Bump mini_portile dependency

Lot of things have changed in that area, so we better use latest
version.

Author: luislavena

Gemfile

@@ -8,7 +8,7 @@ source "https://rubygems.org/"
 gem "minitest", "~>5.0", :group => [:development, :test]
 gem "rdoc", "~>4.0", :group => [:development, :test]
 gem "rake-compiler", "~>0.9.1", :group => [:development, :test]
-gem "mini_portile", "~>0.2.2", :group => [:development, :test]
+gem "mini_portile", "~>0.5.1", :group => [:development, :test]
 gem "hoe-bundler", "~>1.0", :group => [:development, :test]
 gem "hoe", "~>3.7", :group => [:development, :test]
 

tasks/gem.rake

@@ -24,7 +24,7 @@ HOE = Hoe.spec 'sqlite3' do
   spec_extras[:license] = "MIT"
 
   extra_dev_deps << ['rake-compiler', "~> 0.9.1"]
-  extra_dev_deps << ["mini_portile", "~> 0.2.2"]
+  extra_dev_deps << ["mini_portile", "~> 0.5.1"]
   extra_dev_deps << ["minitest", "~> 5.0"]
   extra_dev_deps << ["hoe-bundler", "~> 1.0"]