fix(deps): update dependency mailgun.js to v10.1.0 (#248)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [mailgun.js](https://togithub.com/mailgun/mailgun.js) | [`10.0.1` ->
`10.1.0`](https://renovatebot.com/diffs/npm/mailgun.js/10.0.1/10.1.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/mailgun.js/10.1.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/mailgun.js/10.1.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/mailgun.js/10.0.1/10.1.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/mailgun.js/10.0.1/10.1.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>mailgun/mailgun.js (mailgun.js)</summary>

###
[`v10.1.0`](https://togithub.com/mailgun/mailgun.js/blob/HEAD/CHANGELOG.md#1010-2024-01-31)

[Compare
Source](https://togithub.com/mailgun/mailgun.js/compare/v10.0.1...v10.1.0)

##### Features

- Add proxy configuration to the client
([fa013f1](https://togithub.com/mailgun/mailgun.js/commits/fa013f1f49792d1e42b4e718b629514198393f4e))

##### Bug Fixes

- **docs:** Add url param for EU infrastructure
([360b867](https://togithub.com/mailgun/mailgun.js/commits/360b867c03da6f70669e6bba0c3070fdd9f10885))

##### Other changes

- Update readme
([3897e59](https://togithub.com/mailgun/mailgun.js/commits/3897e59554316994579960eb5f3ee7373b72f29d))

#####
[10.0.1](https://togithub.com/mailgun/mailgun.js/compare/v10.0.0...v10.0.1)
(2024-01-26)

##### Bug Fixes

- Update vulnerable version of lodash.set
([cf6c8e9](https://togithub.com/mailgun/mailgun.js/commits/cf6c8e96a9e6bdb2dd1682ee703ee29c4024da6f))

</details>

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email-function/package.json

@@ -21,7 +21,7 @@
     "@types/node": "20.10.2",
     "dotenv": "16.4.1",
     "form-data": "4.0.0",
-    "mailgun.js": "10.0.1",
+    "mailgun.js": "10.1.0",
     "openpgp": "5.11.0",
     "serialize-error": "11.0.3",
     "zod": "3.22.4"