Bump ts-jest from 26.4.4 to 26.5.6 (#15)

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 26.4.4 to 26.5.6.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/main/CHANGELOG.md)
- [Commits](kulshekhar/ts-jest@v26.4.4...v26.5.6)

---
updated-dependencies:
- dependency-name: ts-jest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -54,7 +54,7 @@
         "eslint-config-prettier": "^6.0.0",
         "jest": "^26.0.1",
         "prettier": "^2.1.1",
-        "ts-jest": "^26.0.0",
+        "ts-jest": "^26.5.6",
         "typescript": "^4.4.3"
     },
     "jest": {