Update dependency dict2xml to v1.7.6 (#7)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [dict2xml](https://togithub.com/delfick/python-dict2xml) | `==1.7.5`
-> `==1.7.6` |
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|
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|
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|
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|

---

### Release Notes

<details>
<summary>delfick/python-dict2xml (dict2xml)</summary>

###
[`v1.7.6`](https://togithub.com/delfick/python-dict2xml/compare/release-1.7.5...release-1.7.6)

[Compare
Source](https://togithub.com/delfick/python-dict2xml/compare/release-1.7.5...release-1.7.6)

</details>

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requirements.txt

@@ -1 +1 @@
-dict2xml==1.7.5
+dict2xml==1.7.6