Run Unit Tests against PHP 7.4

Bump PHPUnit version and fix unit test

  - Globals are handled differently and are persistent through tests
  - Tests without assertions are marked as risky: some of them are just
meant to check that no error is raised.

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/config/ConfigPhpTest.php b/tests/config/ConfigPhpTest.php
index 67d878ce..fb91b51b 100644
--- a/tests/config/ConfigPhpTest.php
+++ b/tests/config/ConfigPhpTest.php
@@ -3,6 +3,10 @@ namespace Shaarli\Config;
 
 /**
  * Class ConfigPhpTest
+ *
+ * We run tests in separate processes due to the usage for $GLOBALS
+ * which are kept between tests.
+ * @runTestsInSeparateProcesses
  */
 class ConfigPhpTest extends \PHPUnit\Framework\TestCase
 {