v1.2.0

Changelog

Bugs fixed:

• recursively process directory(a612b8b)
• indexer: add validation to slug(0c9fb1e)
• log: fix some log issue(29fba6e)

Performance improves:

• build index in concurrency(7a2b124)
• process images concurrently(f23b327)
• none minimizer should do nothing(07a2b89)