Merge pull request #34 from ipdata/claude/fix-api-key-env-var-j6bTt

Fix _normalize_ip_key to properly normalize IP addresses

Added IPTrie library

Added IPTrie - A fast, type-safe data structure for IP lookups with longest-prefix matching. Supports both IPv4 and IPv6.

bump version

fix CSV writing for bulk lookups

bump version

remove minimum python setting

bump to 4.0.3

update .gitignore

updated help comment

Added `--exclude/-e` to bulk