Travis CI has different sqlite3 requirements

http://stackoverflow.com/a/31757819

Author: zoras

suture.gemspec

@@ -18,12 +18,11 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  sqlite3 = if defined? JRUBY_VERSION
-              "activerecord-jdbcsqlite3-adapter"
-            else
-              "sqlite3"
-            end
-  spec.add_dependency sqlite3
+  # for CRuby, Rubinius, including Windows and RubyInstaller
+  spec.add_dependency "sqlite3", :platform => [:ruby, :mswin, :mingw]
+  # for JRuby
+  spec.add_dependency "jdbc-sqlite3", :platform => :jruby
+
   spec.add_dependency "backports"
   spec.add_dependency "bar-of-progress", ">= 0.1.3"