Meson: Require catch2 >=3.4.0 (instead of >3.4.0)

[why]
To bring the requirement in sync with the one listed in the Debian
control file.

Proposed-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
Signed-off-by: Lars Froehlich <lars.froehlich@desy.de>

Author: alt-graph

tests/meson.build

@@ -12,7 +12,7 @@ test('all',
     executable(meson.project_name() + '_test',
         test_src,
         dependencies : [
-            dependency('catch2', version : '>3.4.0'),
+            dependency('catch2', version : '>=3.4.0'),
             libgit4cpp_dep,
         ],
     ),