Bump minimum ruby verison to 2.3.0 and udpate gems

.travis.yml

@@ -2,8 +2,7 @@ language: ruby
 cache: bundler
 
 rvm:
-  - 1.9.3
-  - 2.1.0
+  - 2.3.0
   - ruby-head
 
 notifications:

Gemfile.lock

@@ -13,30 +13,30 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     concurrent-ruby (1.1.4)
-    coveralls (0.8.20)
+    coveralls (0.8.22)
       json (>= 1.8, < 3)
-      simplecov (~> 0.14.1)
+      simplecov (~> 0.16.1)
       term-ansicolor (~> 1.3)
       thor (~> 0.19.4)
       tins (~> 1.6)
-    docile (1.1.5)
+    docile (1.3.1)
     i18n (1.5.3)
       concurrent-ruby (~> 1.0)
-    json (1.8.6)
-    minitest (5.10.1)
-    rake (12.0.0)
+    json (2.1.0)
+    minitest (5.11.3)
+    rake (12.3.2)
     rdoc (6.1.1)
-    simplecov (0.14.1)
-      docile (~> 1.1.0)
+    simplecov (0.16.1)
+      docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.0)
-    term-ansicolor (1.3.2)
+    simplecov-html (0.10.2)
+    term-ansicolor (1.7.1)
       tins (~> 1.0)
     thor (0.19.4)
-    thread_safe (0.3.5)
-    tins (1.6.0)
-    tzinfo (1.2.2)
+    thread_safe (0.3.6)
+    tins (1.20.2)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
 
 PLATFORMS
@@ -48,9 +48,8 @@ DEPENDENCIES
   rake
   rdoc
   ruby-bbcode!
-  term-ansicolor (< 1.4)
-  tins (< 1.7)
+  term-ansicolor
   tzinfo
 
 BUNDLED WITH
-   1.13.7
+   1.17.3

ruby-bbcode.gemspec

@@ -8,7 +8,7 @@ Gem::Specification.new do |s|
   s.name        = "ruby-bbcode"
   s.version     = RubyBBCode::VERSION
   s.platform    = Gem::Platform::RUBY
-  s.required_ruby_version = '>= 1.9.3'
+  s.required_ruby_version = '>= 2.3.0'
   s.author      = "Maarten Bezemer"
   s.email       = "maarten.bezemer@gmail.com"
   s.homepage    = "http://github.com/veger/ruby-bbcode"
@@ -28,7 +28,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'coveralls', '>= 0.8.0'
 
-  # Ruby 1.9 compatibility
-  s.add_development_dependency 'term-ansicolor', '< 1.4'
-  s.add_development_dependency 'tins', '< 1.7'
+  s.add_development_dependency 'term-ansicolor'
 end