Update version to 1.2.2

Merge pull request #466 from harry0703/dev

fixed: subtitle generation failure

Merge pull request #461 from harry0703/dev

Optimize memory usage in moviepy

Merge pull request #369 from harry0703/dev

update version to 1.1.9

Merge pull request #264 from harry0703/dev

support azure new speech voice and fix the bug where clip were not closed

Merge pull request #235 from harry0703/dev

optimize i18n