chore(deps): update dependency eslint-plugin-unused-imports to v4 (#950)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[eslint-plugin-unused-imports](https://github.com/sweepline/eslint-plugin-unused-imports)
| [`^3.2.0` ->
`^4.0.0`](https://renovatebot.com/diffs/npm/eslint-plugin-unused-imports/3.2.0/4.0.0)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/eslint-plugin-unused-imports/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/eslint-plugin-unused-imports/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/eslint-plugin-unused-imports/3.2.0/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/eslint-plugin-unused-imports/3.2.0/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>sweepline/eslint-plugin-unused-imports
(eslint-plugin-unused-imports)</summary>

###
[`v4.0.0`](https://github.com/sweepline/eslint-plugin-unused-imports/compare/77e06961513a868aef7bb88477014c903fbe95bd...821b01d7bfa51167c32e919584d8fb0132f7a96a)

[Compare
Source](https://github.com/sweepline/eslint-plugin-unused-imports/compare/77e06961513a868aef7bb88477014c903fbe95bd...821b01d7bfa51167c32e919584d8fb0132f7a96a)

</details>

---

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Abhi Markan <amarkan@ukexportfinance.gov.uk>

package.json

@@ -97,7 +97,7 @@
     "eslint-plugin-security": "^3.0.0",
     "eslint-plugin-simple-import-sort": "^12.1.0",
     "eslint-plugin-switch-case": "^1.1.2",
-    "eslint-plugin-unused-imports": "^3.2.0",
+    "eslint-plugin-unused-imports": "^4.0.0",
     "husky": "^9.0.11",
     "jest": "29.7.0",
     "jest-when": "^3.6.0",