0.5.1 (2019-11-23)

1. Bug Fix: Connection hangs with header filter at thread-pool mode #209 #153
2. Bug Fix: Body filter hangs when body size is larger than the value specified in proxy_buffers #219
3. Bug Fix: Segment fault caused by request is marked as closed too late #222
4. Code Style: Fix generic warnings in java code code-style #223 (Thanks to Michael @mgoblin)
5. Bug Fix: NPE caused by damaged memory because unsafe modify response headers #198
6. Bug Fix: Wrong response for uncompressed message with PMCE enabled #163
7. CI: both auto-triggered unit test and integration test use travis-ci