chore: upgrade catch2, cpp-httplib, libmaxminddb; fix GeoIP test ordering

- Bump catch2 3.8.0→3.14.0
- Bump cpp-httplib 0.18.3→0.39.0
- Bump libmaxminddb 1.10.0→1.12.2
- yaml-cpp kept at 0.8.0 (0.9.0 causes heap corruption at process exit)
- Add MaxmindDB::disable() to allow resetting singleton state in tests
- Reset GeoIP/GeoASN singletons before "Geo enablement" section so tests
  pass regardless of Catch2 randomized execution order (new default in 3.x)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leoparente

conanfile.py

@@ -7,13 +7,13 @@ class Pktvisor(ConanFile):
     generators = "CMakeToolchain", "CMakeDeps"
 
     def requirements(self):
-        self.requires("catch2/3.8.0")
+        self.requires("catch2/3.14.0")
         self.requires("corrade/2020.06")
-        self.requires("cpp-httplib/0.18.3")
+        self.requires("cpp-httplib/0.39.0")
         self.requires("docopt.cpp/0.6.3")
         self.requires("fast-cpp-csv-parser/cci.20240102")
         self.requires("json-schema-validator/2.3.0")
-        self.requires("libmaxminddb/1.10.0")
+        self.requires("libmaxminddb/1.12.2")
         self.requires("nlohmann_json/3.11.3")
         self.requires("openssl/3.3.2")
         if self.settings.os != "Windows":

src/GeoDB.h

@@ -57,6 +57,15 @@ class MaxmindDB
     ~MaxmindDB();
 
     void enable(const std::string &database_filename, int cache_size = DEFAULT_CACHE_SIZE);
+    void disable()
+    {
+        if (_enabled) {
+            MMDB_close(&_mmdb);
+            _enabled = false;
+        }
+        _lru_geo_cache.reset();
+        _lru_asn_cache.reset();
+    }
     bool enabled() const
     {
         return _enabled;

src/tests/test_geoip.cpp

@@ -13,6 +13,8 @@ TEST_CASE("GeoIP", "[geoip]")
 {
     SECTION("Geo enablement")
     {
+        visor::geo::GeoIP().disable();
+        visor::geo::GeoASN().disable();
         CHECK(!visor::geo::GeoIP().enabled());
         CHECK_THROWS(visor::geo::GeoIP().enable("nonexistent.mmdb"));
         CHECK(!visor::geo::GeoIP().enabled());