Release v2.0.0-alpha.11

Release 2.0.0-alpha.10

Release 2.0.0-alpha.9

Release 2.0.0-alpha.8

Release 2.0.0-alpha.7

Upgrade tesseract.js-core to fix issue

Release 2.0.0-alpha.5

Add prepublish back

Fix image url in README.md and release 1.0.19

Update README.md