Update dependency ts-jest to v26.5.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ts-jest (source)	26.5.2 -> 26.5.4

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Release Notes

kulshekhar/ts-jest

### [`v26.5.4`](https://togithub.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md#​2654-httpsgithubcomkulshekharts-jestcomparev2653v2654-2021-03-17) [Compare Source](https://togithub.com/kulshekhar/ts-jest/compare/v26.5.3...v26.5.4) ##### Bug Fixes - **compiler:** initialize compiler with `.ts`/`.tsx`/`.d.ts` files only ([#​2457](https://togithub.com/kulshekhar/ts-jest/issues/2457)) ([1dc731a](https://togithub.com/kulshekhar/ts-jest/commit/1dc731a5faf7cda59db1cc642eb99fae973b1246)), closes [#​2445](https://togithub.com/kulshekhar/ts-jest/issues/2445) ### [`v26.5.3`](https://togithub.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md#​2653-httpsgithubcomkulshekharts-jestcomparev2652v2653-2021-03-03) [Compare Source](https://togithub.com/kulshekhar/ts-jest/compare/v26.5.2...v26.5.3) ##### Bug Fixes - **config:** create fallback jest config when jest config is undefined ([#​2421](https://togithub.com/kulshekhar/ts-jest/issues/2421)) ([0fb6b45](https://togithub.com/kulshekhar/ts-jest/commit/0fb6b45e7dc3dd7588d27f09ac9a8849dff470cb)), closes [#​2085](https://togithub.com/kulshekhar/ts-jest/issues/2085) - remove `@types/jest` from direct dep ([#​2416](https://togithub.com/kulshekhar/ts-jest/issues/2416)) ([060302e](https://togithub.com/kulshekhar/ts-jest/commit/060302ed1eb8708df0acd7ab1d613ff06fc08cf3)), closes [#​2406](https://togithub.com/kulshekhar/ts-jest/issues/2406) [#​2411](https://togithub.com/kulshekhar/ts-jest/issues/2411) - **compiler:** return original file content on emit skip ([#​2408](https://togithub.com/kulshekhar/ts-jest/issues/2408)) ([cfba8f4](https://togithub.com/kulshekhar/ts-jest/commit/cfba8f423dd59536d8b1e1374ef2b20bff2ed857)), closes [#​2407](https://togithub.com/kulshekhar/ts-jest/issues/2407)

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