Version Details and Security Vulnerabilities

ts-jest version 26.4.0 brings several notable updates compared to the previous stable version 26.3.0, potentially impacting developers utilizing TypeScript with Jest for testing. A key change lies within the dependencies. The jest-util dependency is updated to ^26.1.0 bringing in the latest bug fixes. Additionally, the yargs-parser dependency sees a substantial upgrade from version 18.x to 20.x. Developers should be mindful of this change as it might introduce compatibility issues or require adjustments to command-line argument parsing within their tests.

Furthermore, the development dependencies feature a few updates of interest. The @commitlint/cli and @commitlint/config-conventional packages have been upgraded from the 10.x series to the 11.x series. There's also an update to @typescript-eslint/parser and @typescript-eslint/eslint-plugin from "latest" to version 3.x.

While the peer dependencies for both Jest and TypeScript remain consistent, developers should always verify compatibility with their specific project setup. These updates collectively aim to enhance the stability and functionality of ts-jest, ensuring a smoother testing experience for TypeScript projects. The increase in file count (80 to 82) and unpacked size (211124 to 213822) hint at internal improvements and added features or tests. The updated release date reflects a more recent set of changes and potential bug fixes.