[compression] fix compression management

[ome9ax]

Describe the bug

I can't safely uncompress the output file.

To Reproduce

Steps to reproduce the behavior:

1. Choose gzip or lzma as a compression algorythm.
2. Run the command some-singer-tap | target-s3-jsonl --config [config.json]
3. Try to unzip the output

Expected behavior

I expect to be able to uncompress the target output

Screenshots

If applicable, add screenshots to help explain your problem.

Your environment

• Version of target: 0.0.5
• Version of python 3.8

Additional context

Basically the issue is due to the if instead of elif introduced with lzma in the save_file function. It allow the uncompressed data to be appended to the file, hence the file inconsistency.