build(deps-dev): bump ts-jest from 26.5.5 to 26.5.6 (#261)

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 26.5.5 to 26.5.6.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md)
- [Commits](kulshekhar/ts-jest@v26.5.5...v26.5.6)

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

Author: dependabot[bot]

package-lock.json

@@ -67,7 +67,7 @@
     "remark-lint-no-dead-urls": "^1.1.0",
     "remark-preset-lint-recommended": "^5.0.0",
     "standard-version": "^9.3.0",
-    "ts-jest": "^26.5.4",
+    "ts-jest": "^26.5.6",
     "typescript": "^4.2.4",
     "webpack": "^4.46.0",
     "webpack-image-resize-loader": "^4.0.0"