Bump ts-jest from 26.4.4 to 26.5.1 (#313)

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 26.4.4 to 26.5.1.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md)
- [Commits](kulshekhar/ts-jest@v26.4.4...v26.5.1)

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

package.json

@@ -49,7 +49,7 @@
     "jest-circus": "^26.6.3",
     "js-yaml": "^4.0.0",
     "prettier": "^2.2.1",
-    "ts-jest": "^26.4.4",
+    "ts-jest": "^26.5.1",
     "typescript": "^4.1.5"
   }
 }