Change sleep time to 1 second

Merge pull request #5 from misu99/master

fix: The cpu usage is too high.

Bump up go version to 1.17

Fix unit test for loki syncer

Make loki syncer thread safe

Make write async

Make loki syncer use internal atomic map

Add prefix in options of loki syncer

Add loki syncer

Add a new function for creating logger with override