### Added
- Put compile_file hook behind a feature flag, default on #757
### Changed
- Require curl at configuration time #766
- Log background sender messages to error_log #776
- Deprecate manual usage of legacy Symfony bundles and Laravel provider #772
- Separate background sender timeout env vars from userland #773
### Fixed
- Gracefully handle a dropped span on exit #765
- Update contribution guidelines #769
- Trace http response code when set via function 'http_response_code' #755 - thanks @aderiyenko
- Fix execinfo on builds from source in Alpine containers #752