test(php-shim): un-ignore tests now unblocked by implemented shims

Remove #[ignore] from tests gated solely on a shim function that is now
implemented, where the test passes:
- metapackage_installer::test_update (version_compare)
- platform_requirement_filter_factory::test_from_bool_throws... (get_debug_type)
- runtime::test_parse_extension_info (html_entity_decode/strip_tags)
- package_sorter::test_sorting_does_nothing... (strnatcasecmp)
- no_proxy_pattern::test_host_name/test_port (unpack/substr_count)
- version_parser::test_is_upgrade (version_compare)
- pool::test_what_provides_package_with_constraint
- proxy_item::test_throws_on_malformed_url

Update the ignore reason where the cited shim is now implemented but the
test still cannot pass for a different reason:
- no_proxy_pattern::test_ip_address/test_ip_range (IPv4-mapped IPv6 gap)
- package_sorter::test_sorting_orders... (look-around regex)
- proxy_item::test_url_formatting (parse_url host discrepancy)
- json_manipulator/json_config_source/filesystem_repository stubs
  (test bodies are still todo!(), not yet ported)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/crates/shirabe/tests/util/package_sorter_test.rs b/crates/shirabe/tests/util/package_sorter_test.rs
index 1b95824..f84ff09 100644
--- a/crates/shirabe/tests/util/package_sorter_test.rs
+++ b/crates/shirabe/tests/util/package_sorter_test.rs
@@ -32,7 +32,6 @@ fn names(packages: &[PackageInterfaceHandle]) -> Vec<String> {
 }
 
 #[test]
-#[ignore = "PackageSorter::sort_packages reaches strnatcasecmp, a todo!() in the php-shim"]
 fn test_sorting_does_nothing_with_no_dependencies() {
     let packages = vec![
         create_package("foo/bar1", &[]),
@@ -142,7 +141,7 @@ fn sorting_orders_dependencies_higher_than_package_cases() -> Vec<(
 }
 
 #[test]
-#[ignore = "PackageSorter::sort_packages reaches strnatcasecmp, a todo!() in the php-shim"]
+#[ignore = "constraint parsing reaches a look-around regex unsupported by the regex-crate shim (Preg)"]
 fn test_sorting_orders_dependencies_higher_than_package() {
     for (packages, expected_ordered_list, weights) in
         sorting_orders_dependencies_higher_than_package_cases()