Update dependency ts-jest to v25.5.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ts-jest (source)	devDependencies	patch	25.5.0 -> 25.5.1

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Release Notes

kulshekhar/ts-jest

### [`v25.5.1`](https://togithub.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md#​2551-httpsgithubcomkulshekharts-jestcomparev2550v2551-2020-05-09) [Compare Source](https://togithub.com/kulshekhar/ts-jest/compare/v25.5.0...v25.5.1) ##### Bug Fixes - **compiler:** don't resolve files from build folder for `projectReferences` ([#​1614](https://togithub.com/kulshekhar/ts-jest/issues/1614)) ([74b92d3](https://togithub.com/kulshekhar/ts-jest/commit/74b92d3)) - **config:** don't set `include` value of `tsconfig` to empty array ([#​1606](https://togithub.com/kulshekhar/ts-jest/issues/1606)) ([8a29aaa](https://togithub.com/kulshekhar/ts-jest/commit/8a29aaa))

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