Add tests build option

meson_options.txt

@@ -13,3 +13,8 @@ option('docs',
   value: 'auto',
   description: 'Doxygen API documentation.'
 )
+option('tests',
+  type: 'feature',
+  value: 'auto',
+  description: 'run tests'
+)

tests/meson.build

-check = dependency('check', required: false)
+check = dependency('check', required: get_option('tests'))
 if check.found()
   test_dependencies = [
     declare_dependency(link_with: girara),