Merge branch 'phpunit' into 'master'

Upgrade phpunit config

See merge request !6

doc/develop.md

@@ -15,13 +15,13 @@ Tests are organized into two groups:
 * `@group unit`: Basic tests that run without much environmental setup/support. To run this group:
     ```bash
     cd coworker
-    phpunit8 --group unit
+    phpunit9 --group unit
     ```
 * `@group e2e`: End-to-end tests that require a working Civi instance (`CV_TEST_BUILD`). To run this group:
     ```bash
     cd coworker
     export CV_TEST_BUILD='/path/to/site/root'
-    phpunit8 --group e2e
+    phpunit9 --group e2e
     ```
     <!-- Wishlist: Alow E2E testing on (cv || drush || wp-cli).  Take pipe-command instead of folder-path, and get everything you need via pipe. -->
 

phpunit.xml.dist

-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
-         cacheResult ="false"
-         colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false"
-         bootstrap="tests/bootstrap.php"
->
+<?xml version="1.0"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" backupStaticAttributes="false" cacheResult="false" colors="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" bootstrap="tests/bootstrap.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </coverage>
   <testsuites>
     <testsuite name="Coworker Test Suite">
       <directory>./tests/</directory>
     </testsuite>
   </testsuites>
-
-  <filter>
-    <whitelist>
-      <directory suffix=".php">./src</directory>
-    </whitelist>
-  </filter>
 </phpunit>

scripts/run-tests.sh

@@ -10,5 +10,5 @@ shift
 
 set -x
 
-phpunit8 --group unit "$@"
-phpunit8 --group e2e "$@"
+phpunit9 --group unit "$@"
+phpunit9 --group e2e "$@"