feat(ruby): update supported ruby versions and gem dependencies

3 files changed, 4 insertions, 6 deletions

diff --git a/.travis.yml b/.travis.yml
index aa9aad0a..75643824 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ dist: trusty
 group: beta
 cache: bundler
 bundler_args: --without profile
-  
+
 notifications:
   irc: "irc.freenode.org#axlsx"
   email:
@@ -14,10 +14,8 @@ notifications:
 
 matrix:
   include:
-    - rvm: 2.1
     - rvm: 2.2.7
     - rvm: 2.3.4
-    - rvm: 2.0.0
     - rvm: 2.4.1
     - rvm: rbx-3
     - rvm: jruby-19mode
diff --git a/Gemfile b/Gemfile
index 89ed374d..67d33562 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ group :test do
   else
     gem 'rake'
   end
-  gem 'simplecov'
+  gem 'simplecov', '>= 0.14.1'
   gem 'test-unit'
 end
 
diff --git a/axlsx.gemspec b/axlsx.gemspec
index 228d5a98..1b00a54a 100644
--- a/axlsx.gemspec
+++ b/axlsx.gemspec
@@ -17,14 +17,14 @@ Gem::Specification.new do |s|
   s.files = Dir.glob("{lib/**/*,examples/**/*.rb,examples/**/*.jpeg}") + %w{ LICENSE README.md Rakefile CHANGELOG.md .yardopts .yardopts_guide }
   s.test_files  = Dir.glob("{test/**/*}")
 
-  s.add_runtime_dependency 'nokogiri', '>= 1.6.6'
+  s.add_runtime_dependency 'nokogiri', '>= 1.7.1'
   s.add_runtime_dependency 'rubyzip', '>= 1.2.1'
   s.add_runtime_dependency "htmlentities", "~> 4.3.4"
   s.add_runtime_dependency "mimemagic", "~> 0.3"
 
   s.add_development_dependency 'yard'
   s.add_development_dependency 'kramdown'
-  s.add_development_dependency 'timecop', "~> 0.6.1"
+  s.add_development_dependency 'timecop', "~> 0.8.1"
   s.required_ruby_version = '>= 1.9.2'
   s.require_path = 'lib'
 end