Update lzbench to v2.0.1

change lizard version to 2.0

azure-pipelines.yml: Add a trigger for pull requests

update lzbench version to v1.8.1

Update README.md with a new results

Travis CI: create static builds for tests using qemu

Update NEWS

results updated with lzbench v1.7.1

disabled lzrw -2 (crashes on ARM)

updated NEWS

reverted lz4hc.c