Simplify meson for tests

tests/meson.build

 test_sources = files([
-        'test_file_helper.cpp',
-        'test_file_logging.cpp',
-    	'test_daily_logger.cpp',
-        'test_misc.cpp',
-        'test_pattern_formatter.cpp',
-        'test_async.cpp',
-        'test_registry.cpp',
-        'test_macros.cpp',
-        'utils.cpp',
-        'main.cpp',
-        'test_mpmc_q.cpp',
-    	'test_dup_filter.cpp',
-        'test_fmt_helper.cpp',
-      	'test_stdout_api.cpp',
-    	'test_backtrace.cpp',
-    	'test_create_dir.cpp'
+    'test_file_helper.cpp',
+    'test_file_logging.cpp',
+    'test_daily_logger.cpp',
+    'test_misc.cpp',
+    'test_pattern_formatter.cpp',
+    'test_async.cpp',
+    'test_registry.cpp',
+    'test_macros.cpp',
+    'utils.cpp',
+    'main.cpp',
+    'test_mpmc_q.cpp',
+    'test_dup_filter.cpp',
+    'test_fmt_helper.cpp',
+    'test_stdout_api.cpp',
+    'test_backtrace.cpp',
+    'test_create_dir.cpp'
 ])
 
-
 if  not get_option('no_exceptions')
     test_sources += 'test_errors.cpp'
 endif
@@ -38,13 +37,8 @@ endif
 # --------------------------------------
 # ---   Build the test executables   ---
 # --------------------------------------
+test_exe = executable('spdlog-utests', test_sources, dependencies: global_test_deps + [spdlog_dep])
+test('test_spdlog', test_exe, is_parallel : false)
 
-test_matrix =  [
-  ['spdlog-utests',    spdlog_dep],
-  ['spdlog-utests-ho', spdlog_headeronly_dep],
-]
-
-foreach i : test_matrix
-  test_exe = executable(i[0], test_sources, dependencies: global_test_deps + [i[1]])
-  test('test_' + i[0], test_exe, is_parallel : false)
-endforeach
+test_exe = executable('spdlog-utests-ho', test_sources, dependencies: global_test_deps + [spdlog_headeronly_dep])
+test('test_spdlog-ho', test_exe, is_parallel : false)
\ No newline at end of file