Bump ts-jest from 26.5.2 to 26.5.6

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 26.5.2 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@v26.5.2...v26.5.6)

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

package.json

@@ -79,7 +79,7 @@
 		"jest-styled-components": "7.0.3",
 		"npm-run-all": "^4.1.5",
 		"prettier": "^2.2.1",
-		"ts-jest": "^26.5.2",
+		"ts-jest": "^26.5.6",
 		"tslint-config-prettier": "^1.18.0",
 		"typescript": "^4.2.4"
 	},