v2.3.1

[leepc12]

• Use file metadata DB by default (--db file). If you see any DB connection timeout then switch back to in-memory DB with --db in-memory, then you will pass the error but call-caching will be disabled.
• Changed default file path for such file DB (--file-db): ${local_out_dir}/caper-db_[WDL_BASENAME]_[INPUT_JSON_BASENAME]. local_out_dir can be defined either in command line or conf file (~/.caper/default.conf).
• Can use a relative path in input JSON. If it still doesn't work. pip install autouri --upgrade
• Changed local file hashing strategy from path+modtime to xxh64 to prevent call-caching's cache miss due to the same text file with different modtime (e.g. modified by touch).