build(deps-dev): bump ts-jest from 26.2.0 to 26.3.0

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 26.2.0 to 26.3.0.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md)
- [Commits](kulshekhar/ts-jest@v26.2.0...v26.3.0)

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Author: dependabot[bot]