Removed the tests from composer installs, again (ref #1908)

.gitattributes

@@ -1,5 +1,14 @@
+/tests export-ignore
+/src/Standards/Generic/Tests export-ignore
+/src/Standards/MySource/Tests export-ignore
+/src/Standards/PEAR/Tests export-ignore
+/src/Standards/PSR1/Tests export-ignore
+/src/Standards/PSR2/Tests export-ignore
+/src/Standards/PSR12/Tests export-ignore
+/src/Standards/Squiz/Tests export-ignore
+/src/Standards/Zend/Tests export-ignore
+.cspell.json export-ignore
 .travis.yml export-ignore
-package.xml export-ignore
 phpunit.xml.dist export-ignore
 php5-testingConfig.ini export-ignore
 php7-testingConfig.ini export-ignore

CHANGELOG.md

@@ -2,6 +2,10 @@
 The file documents changes to the PHP_CodeSniffer project.
 
 ## [Unreleased]
+
+### Changes
+- Composer installs no longer include any test files
+
 ### Removed
 - Support for the deprecated `@codingStandard` annotation syntax has been removed
     - Use the `phpcs:` or `@phpcs:` syntax instead