Bump jest and ts-jest (#79)

Bumps [jest](https://github.com/facebook/jest) and [ts-jest](https://github.com/kulshekhar/ts-jest). These dependencies needed to be updated together.

Updates `jest` from 24.9.0 to 25.1.0
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/compare/v24.9.0...v25.1.0)

Updates `ts-jest` from 24.3.0 to 25.0.0
- [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/compare/v24.3.0...v25.0.0)

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

package.json

@@ -34,11 +34,11 @@
     "@types/download": "^6.2.4",
     "@types/jest": "^24.9.0",
     "@types/node": "^13.1.8",
-    "jest": "^24.8.0",
+    "jest": "^25.1.0",
     "jest-circus": "^25.1.0",
     "jest-runtime": "^25.1.0",
     "prettier": "^1.19.1",
-    "ts-jest": "^24.3.0",
+    "ts-jest": "^25.0.0",
     "typescript": "^3.7.5",
     "typescript-formatter": "^7.2.2"
   }