* Update fixtures to 0.8.3
* v0.8.1 tests use new test path
* LFS caching: handle multiple versions of json_tests
* Enable paths > 260 characters in appveyor
* Appveyor: use git clone core.longpaths + the env variable at startup
* improve process_lfs.sh and cleanup submodules
* initial commit of official state tests
* sanity check fixture
* Parsing official state test is mostly working
(Except BLS signature)
* Successfully load state test
* Use json-serialization instead of json and display deserialized and from scratch beacon state hashes
* Add official state test as a smoke parsing test