Add .eggs to default exclusions

[BeyondEvil]

If you have a package that you publish using setuptools_scm and you use tox to run tests etc., you end up with an .eggs directory. I think it is safe to assume this can be excluded by default.

We use tox in our CI and use black with the --check flag, which then fails because black formats the .py-files inside the .eggs folder generated by tox.

[coveralls]

Pull Request Test Coverage Report for Build 823

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.095%

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Totals
Change from base Build 822:	0.0%
Covered Lines:	2904
Relevant Lines:	3022

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 823

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.095%

---

Totals
Change from base Build 822:	0.0%
Covered Lines:	2904
Relevant Lines:	3022

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 823

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.095%

---

Totals
Change from base Build 822:	0.0%
Covered Lines:	2904
Relevant Lines:	3022

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 823

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.095%

---

Totals
Change from base Build 822:	0.0%
Covered Lines:	2904
Relevant Lines:	3022

---

💛 - Coveralls