brotli: Changelog

Version Message
0.15.0 - change: default mode of brotli_uncompress_add() to BROTLI_FLUSH
- change: default mode of brotli_compress_add() to BROTLI_FLUSH
- add: BROTLI_FLUSH to environment variables
- remove: PHP 5 support
0.14.2 - fix module version
0.14.1 - update build-in brotli library to v1.1.0
0.14.0 - First release