Release v0.1.2

Changes

Added

• Cross-platform support for get_env utility function (Unix/macOS/Windows)

Fixed

• Fix macro definitions to use correct field access syntax
• Replace std::chrono::parse with cross-platform manual parsing in to_milliseconds and to_nanoseconds for macOS compatibility
• Use UTC-aware time conversion (timegm/_mkgmtime) instead of local time (mktime) for ISO 8601 timestamp parsing
• Replace std::format with chrono formatters with strftime for GCC 14 compatibility in timestamp_to_string
• Fix std::string_view to std::string conversion in logData for fstream::open compatibility
• Fix linker error by making empty_msg static member variable inline constexpr

Removed

• Unused reconnectMarketData and reconnectUserData methods from WebSocket class
• level2_book.hpp header file (functionality integrated elsewhere)