TypeScript version 2.2.1 represents a minor update to the 2.2.0 release, focusing on bug fixes and stability improvements, as evidenced by the patch version increment. Both versions, described as languages for application-scale JavaScript development, share the same core functionality and licensing under Apache-2.0. Developers already using version 2.2.0 can expect a seamless transition when upgrading to 2.2.1.
The primary difference lies in the devDependencies. Version 2.2.0 uses "typescript": "next" and "tslint": "next" indicating a dependence on the bleeding edge or nightly builds of these tools during development. In contrast, version 2.2.1 pins "typescript": "^2.2" suggesting a reliance on any compatible version within the 2.2.x range and "tslint": "4.3.0-dev.0". This change reflects a shift towards more stable, pre-release versions of these development dependencies during the creation of 2.2.1. This indicates that the development team prioritised stability for the build tools.
From a developer perspective, version 2.2.1 offers a more predictable development experience. While new features and improvements are generally exciting, robust and dependable build processes are equally critical. Therefore, developers using TypeScript should be aware of these subtle changes in the underlying build process. Moreover both versions comes packaged with a comprehensive suite of developer tooling.
The are not vulnerabilities for the version 2.2.1 of the package typescript