Pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
jest (source)	devDependencies	pin	^27.4.3 -> 27.4.3
prettier (source)	devDependencies	pin	^2.5.0 -> 2.5.0
ts-jest (source)	devDependencies	pin	^27.0.7 -> 27.0.7
tslint (source)	devDependencies	pin	^6.1.3 -> 6.1.3
tslint-config-prettier	devDependencies	pin	^1.18.0 -> 1.18.0
typescript (source)	devDependencies	pin	^4.5.2 -> 4.5.2

📌 Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges to your config if you instead don't wish to pin dependencies.

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

• If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.