fix(deps): update dependency tslib to v2.8.0 (#1057)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [tslib](https://www.typescriptlang.org/)
([source](https://redirect.github.com/Microsoft/tslib)) | [`2.7.0` ->
`2.8.0`](https://renovatebot.com/diffs/npm/tslib/2.7.0/2.8.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/tslib/2.8.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/tslib/2.8.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/tslib/2.7.0/2.8.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/tslib/2.7.0/2.8.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>Microsoft/tslib (tslib)</summary>

###
[`v2.8.0`](https://redirect.github.com/microsoft/tslib/releases/tag/v2.8.0)

[Compare
Source](https://redirect.github.com/Microsoft/tslib/compare/v2.7.0...v2.8.0)

#### What's Changed

- Validate export structure of every entrypoint by
[@&#8203;andrewbranch](https://redirect.github.com/andrewbranch) in
[https://github.com/microsoft/tslib/pull/269](https://redirect.github.com/microsoft/tslib/pull/269)
- Add rewriteRelativeImportExtension helper by
[@&#8203;andrewbranch](https://redirect.github.com/andrewbranch) in
[https://github.com/microsoft/tslib/pull/270](https://redirect.github.com/microsoft/tslib/pull/270)

**Full Changelog**:
microsoft/tslib@v2.7.0...v2.8.0

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about these
updates again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/open-feature/js-sdk).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjAuMSIsInVwZGF0ZWRJblZlciI6IjM4LjEyMC4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>