### Added
- Support for global tags via the environment variable `DD_TRACE_GLOBAL_TAGS=key1:value1,key2:value2` #273
### Fixed
- Memory leaks in `$this` object and return value handling in PHP 5.6 and 7.x #268
- Alpine APK package file being badly formatted when some file paths were over 100 character long #274
- Extension being compatible with CentOS 6 and other distributions using old Glibc #265