🔨 upgrade pdf-box dependency

🔨 bump version to 0.2.4

🔨 bump version to 0.2.3

🔨 bump version to 0.2.2

Merge remote-tracking branch 'origin/master'

Update README.md

upgrade dependency due to potential vulnerabilities

remove useless 'done' prompt from logger; bump version to 0.1.4

1. add strict mode

2. bump version to 0.1.3

- provide a more elegant and efficient way to load fonts in each page

- bump version & head comment date