ci: update release unity to 2021

feat: Update package.json to 2.6.0

feat: Update package.json to 2.5.4

Merge pull request #22 from Cosmic-Shores/batchmode-2021-2-fix

fixed headless mode not working in unity 2021.2

feat: Update package.json to 2.5.2

Update package.json

Add OneTimeSetup and others, 2.4.0

fix path

Supports TestCase, TestCaseSource. Improve stability. Add LoadUnitTestScene.

Setup, Teardown