build(deps): update pygit2 requirement

Updates the requirements on [pygit2](https://github.com/libgit2/pygit2) to permit the latest version.
- [Release notes](https://github.com/libgit2/pygit2/releases)
- [Changelog](https://github.com/libgit2/pygit2/blob/master/CHANGELOG.rst)
- [Commits](libgit2/pygit2@v1.2.1...v1.10.0)

---
updated-dependencies:
- dependency-name: pygit2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -32,7 +32,7 @@
     install_requires=[
         "Jinja2>=2.10,<4.0", "PyYAML>=5.1,<7.0", "attrs>=19.3,<22.0", "dill~=0.3",
         "pathos~=0.2", "parse~=1.14", "plumbum~=1.6", "psutil~=5.6",
-        "psycopg2-binary~=2.8", "pygit2>=1.2.1,<1.8.0", "pygtrie~=2.3",
+        "psycopg2-binary~=2.8", "pygit2>=1.2.1,<1.11.0", "pygtrie~=2.3",
         "pyparsing>=2.4,<4.0", "rich>=6.1,<13.0", "sqlalchemy-migrate~=0.13",
         "typing-extensions>=3.7.4.3,<4.2.1.0", "virtualenv>=16.7,<21.0",
         "schema~=0.7.4"