feat: add connection pooling and DNS caching for performance

- Persistent HTTP sessions avoid Connection: close overhead
- DNS pre-resolution with timeout prevents indefinite hangs
- Thread-safe connection pool with LRU eviction
- TLS certificates parsed once at init, not per-request
- Extract TlsParser, DnsCache, ConnectionPool for SRP

Bump to v1.5.0

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/net/hippie/version.rb b/lib/net/hippie/version.rb
index bb07582..7e2b6ff 100644
--- a/lib/net/hippie/version.rb
+++ b/lib/net/hippie/version.rb
@@ -2,6 +2,6 @@
 
 module Net
   module Hippie
-    VERSION = '1.4.0'
+    VERSION = '1.5.0'
   end
 end