chore(deps-dev): bump ts-jest from 25.1.0 to 25.2.1 (#81)

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 25.1.0 to 25.2.1.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kulshekhar/ts-jest/commits)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package.json

@@ -62,7 +62,7 @@
     "@types/sharp": "^0.24.0",
     "husky": "^4.0.9",
     "jest": "~25.1.0",
-    "ts-jest": "~25.1.0",
+    "ts-jest": "~25.2.1",
     "tslint": "^5.12.1",
     "tslint-ionic-rules": "0.0.21",
     "typescript": "~3.8.2"