fix(deps): update dependency deepmerge to v2 (#72)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [deepmerge](https://redirect.github.com/toumorokoshi/deepmerge) |
`==1.1.1` -> `==2.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/deepmerge/2.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/deepmerge/2.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/deepmerge/1.1.1/2.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/deepmerge/1.1.1/2.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>toumorokoshi/deepmerge (deepmerge)</summary>

###
[`v2.0`](https://redirect.github.com/toumorokoshi/deepmerge/releases/tag/v2.0)

[Compare
Source](https://redirect.github.com/toumorokoshi/deepmerge/compare/v1.1.1...v2.0)

#### Breaking Changes

- Add typing / drop Python < 3.8 support by
[@&#8203;nhairs](https://redirect.github.com/nhairs) in
[https://github.com/toumorokoshi/deepmerge/pull/30](https://redirect.github.com/toumorokoshi/deepmerge/pull/30)

#### What's Changed

- feat: add typing for `merge` and `value_strategy` functions by
[@&#8203;Atry](https://redirect.github.com/Atry) in
[https://github.com/toumorokoshi/deepmerge/pull/33](https://redirect.github.com/toumorokoshi/deepmerge/pull/33)
- fix: Different hash for same dictionaries problem by
[@&#8203;alexeykomp](https://redirect.github.com/alexeykomp) in
[https://github.com/toumorokoshi/deepmerge/pull/32](https://redirect.github.com/toumorokoshi/deepmerge/pull/32)

#### New Contributors

- [@&#8203;icy](https://redirect.github.com/icy) made their first
contribution in
[https://github.com/toumorokoshi/deepmerge/pull/29](https://redirect.github.com/toumorokoshi/deepmerge/pull/29)
- [@&#8203;nhairs](https://redirect.github.com/nhairs) made their first
contribution in
[https://github.com/toumorokoshi/deepmerge/pull/30](https://redirect.github.com/toumorokoshi/deepmerge/pull/30)
- [@&#8203;Atry](https://redirect.github.com/Atry) made their first
contribution in
[https://github.com/toumorokoshi/deepmerge/pull/33](https://redirect.github.com/toumorokoshi/deepmerge/pull/33)
- [@&#8203;alexeykomp](https://redirect.github.com/alexeykomp) made
their first contribution in
[https://github.com/toumorokoshi/deepmerge/pull/32](https://redirect.github.com/toumorokoshi/deepmerge/pull/32)

**Full Changelog**:
toumorokoshi/deepmerge@v1.1.1...v2.0

</details>

---

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---

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---

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setup.py

@@ -40,7 +40,7 @@
     "Pygments==2.19.1",
     "pygments-markdown-lexer==0.1.0.dev39",  # sytax coloring to debug md
     "dulwich==0.22.8",  # python implementation of git
-    "deepmerge==1.1.1",
+    "deepmerge==2.0",
 ]
 
 src_root = os.curdir