Travis: build also on Windows

Author: mhujer

.travis.yml

@@ -10,3 +10,27 @@ script:
   - vendor/bin/phing
 after_script:
   - php vendor/bin/coveralls -v
+
+jobs:
+  include:
+    - stage: test
+      os: windows
+      dist: 1803-containers
+      language: sh # No PHP currently
+      env: PHP_VERSION=7.3.12
+      install:
+        - choco install php --version=${PHP_VERSION} --package-parameters="/InstallDir:c:\tools\php"
+        - choco install composer --ia "/DEV=C:\tools\php"
+        - cp 'C:\tools\php\php.ini-production' 'C:\tools\php\php.ini'
+        - echo 'memory_limit=1G' >> 'C:\tools\php\php.ini'
+        - echo 'date.timezone="UTC"' >> 'C:\tools\php\php.ini'
+        - echo 'extension_dir=ext' >> 'C:\tools\php\php.ini'
+        - echo 'extension=php_mbstring.dll' >> 'C:\tools\php\php.ini'
+        - echo 'extension=php_openssl.dll' >> 'C:\tools\php\php.ini'
+        - echo 'extension=php_soap.dll' >> 'C:\tools\php\php.ini'
+        - echo 'extension=php_mysqli.dll' >> 'C:\tools\php\php.ini'
+        - echo 'extension=php_intl.dll' >> 'C:\tools\php\php.ini'
+        - export PATH=/c/tools/php:$PATH
+      script:
+        - vendor/bin/phing tests
+        - vendor/bin/phing phpstan