Bump astroid from 2.6.0 to 2.6.1 (#81)

Bumps [astroid](https://github.com/PyCQA/astroid) from 2.6.0 to 2.6.1.
- [Release notes](https://github.com/PyCQA/astroid/releases)
- [Changelog](https://github.com/PyCQA/astroid/blob/master/ChangeLog)
- [Commits](pylint-dev/astroid@v2.6.0...v2.6.1)

---
updated-dependencies:
- dependency-name: astroid
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 appdirs==1.4.4
-astroid==2.6.0
+astroid==2.6.1
 atomicwrites==1.4.0
 attrs==21.2.0
 black==21.6b0