chore: revert catch2 upgrade, keep only cpp-httplib and libmaxminddb

catch2 3.14.0 breaks cross-compilation; reverted to 3.8.0.
Also revert GeoDB.h disable() and test_geoip.cpp changes that were
only needed to handle catch2 3.14.0 randomized test ordering.

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

Author: leoparente

conanfile.py

@@ -7,7 +7,7 @@ class Pktvisor(ConanFile):
     generators = "CMakeToolchain", "CMakeDeps"
 
     def requirements(self):
-        self.requires("catch2/3.14.0")
+        self.requires("catch2/3.8.0")
         self.requires("corrade/2020.06")
         self.requires("cpp-httplib/0.39.0")
         self.requires("docopt.cpp/0.6.3")

src/GeoDB.h

@@ -57,15 +57,6 @@ 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

@@ -13,8 +13,6 @@ 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());