Run CI tests on Windows with AppVeyor.

The config has been copied from commit
a3b3031 on master.

appveyor.yml

@@ -0,0 +1,94 @@
+version: "{build}-{branch}"
+
+cache:
+  - vendor/bundle
+
+environment:
+  TESTOPTS: --verbose
+
+  matrix:
+    # Ruby 1.8.7 isn't available on AppVeyor.
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 193
+      SSL_CERT_FILE: C:\Ruby193\lib\ruby\1.9.1\rubygems\ssl_certs\ca-bundle.pem
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 200
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 200-x64
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 21
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 21-x64
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 22
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 22-x64
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 23
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 23-x64
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 24
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 24-x64
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 25
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 25-x64
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 26
+
+    - RUBY_ENGINE: ruby
+      RUBY_VERSION: 26-x64
+
+    - RUBY_ENGINE: jruby
+      JRUBY_VERSION: 1.7.27
+
+    - RUBY_ENGINE: jruby
+      JRUBY_VERSION: 9.1.17.0
+
+    - RUBY_ENGINE: jruby
+      JRUBY_VERSION: 9.2.9.0
+
+install:
+  - if not exist vendor mkdir vendor
+  - if %RUBY_ENGINE%==jruby appveyor DownloadFile https://repo1.maven.org/maven2/org/jruby/jruby-dist/%JRUBY_VERSION%/jruby-dist-%JRUBY_VERSION%-bin.zip -FileName vendor\jruby-dist-%JRUBY_VERSION%-bin.zip
+  - if %RUBY_ENGINE%==jruby 7z x vendor\jruby-dist-%JRUBY_VERSION%-bin.zip -ovendor -y
+  - if %RUBY_ENGINE%==jruby set PATH=C:\projects\tzinfo\vendor\jruby-%JRUBY_VERSION%\bin;%PATH%
+  - if %RUBY_ENGINE%==jruby if "%JRUBY_VERSION:~0,2%"=="1." gem install bundler --version "~> 1.17"
+  - if %RUBY_ENGINE%==jruby if not "%JRUBY_VERSION:~0,2%"=="1." gem install bundler
+  - if v%RUBY_VERSION%==v193 appveyor DownloadFile https://github.com/philr/rubyinstaller/releases/download/1.9.3-p551-openssl-tls-1.1-1.2/ruby-1.9.3-p551-i386-mingw32.7z -FileName vendor\ruby-1.9.3-p551-i386-mingw32.7z
+  - if v%RUBY_VERSION%==v193 7z e vendor\ruby-1.9.3-p551-i386-mingw32.7z -ovendor ruby-1.9.3-p551-i386-mingw32\bin\libeay32.dll ruby-1.9.3-p551-i386-mingw32\bin\ssleay32.dll ruby-1.9.3-p551-i386-mingw32\lib\ruby\1.9.1\i386-mingw32\openssl.so ruby-1.9.3-p551-i386-mingw32\lib\ruby\1.9.1\rubygems\ssl_certs\ca-bundle.pem
+  - if v%RUBY_VERSION%==v193 copy /Y vendor\*eay32.dll C:\Ruby193\bin
+  - if v%RUBY_VERSION%==v193 copy /Y vendor\openssl.so C:\Ruby193\lib\ruby\1.9.1\i386-mingw32
+  - if v%RUBY_VERSION%==v193 copy /Y vendor\ca-bundle.pem C:\Ruby193\lib\ruby\1.9.1\rubygems\ssl_certs
+  - if %RUBY_ENGINE%==ruby set PATH=C:\Ruby%RUBY_VERSION%\bin;%PATH%
+  - bundle config --local path vendor/bundle
+  - bundle update
+
+build: off
+
+before_test:
+  - "%RUBY_ENGINE% -v"
+  - gem -v
+  - bundle -v
+
+test_script:
+  - bundle exec rake test
+
+after_test:
+  - bundle clean