Prepare release

Author: sebastianbergmann

ChangeLog-9.1.md

@@ -2,7 +2,7 @@
 
 All notable changes of the PHPUnit 9.1 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
-## [9.1.5] - 2020-MM-DD
+## [9.1.5] - 2020-05-22
 
 ### Fixed
 
@@ -72,7 +72,7 @@ All notable changes of the PHPUnit 9.1 release series are documented in this fil
 * [#4105](https://github.com/sebastianbergmann/phpunit/issues/4105): Deprecate multiple test case classes in single file and test case class name differing from filename
 * [#4141](https://github.com/sebastianbergmann/phpunit/pull/4141): Deprecate Prophecy integration
 
-[9.1.5]: https://github.com/sebastianbergmann/phpunit/compare/9.1.4...9.1
+[9.1.5]: https://github.com/sebastianbergmann/phpunit/compare/9.1.4...9.1.5
 [9.1.4]: https://github.com/sebastianbergmann/phpunit/compare/9.1.3...9.1.4
 [9.1.3]: https://github.com/sebastianbergmann/phpunit/compare/9.1.2...9.1.3
 [9.1.2]: https://github.com/sebastianbergmann/phpunit/compare/9.1.1...9.1.2

src/Runner/Version.php

@@ -33,7 +33,7 @@ public static function id(): string
         }
 
         if (self::$version === '') {
-            self::$version = (new VersionId('9.1.4', \dirname(__DIR__, 2)))->getVersion();
+            self::$version = (new VersionId('9.1.5', \dirname(__DIR__, 2)))->getVersion();
         }
 
         return self::$version;