update PHPUnit workflow to enable coverage reporting with pcov extension

Signed-off-by: binsky <timo@binsky.org>

Author: binsky08

.github/workflows/phpunit-sqlite.yml

@@ -99,7 +99,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-versions }}
           extensions: bz2, ctype, curl, dom, fileinfo, gd, iconv, intl, json, libxml, mbstring, openssl, pcntl, posix, session, simplexml, xmlreader, xmlwriter, zip, zlib, sqlite, pdo_sqlite
-          coverage: none
+          coverage: pcov
           ini-file: development
           ini-values: disable_functions=
         env: