⬆️ Update pylint requirement from ==2.* to ==4.*

Updates the requirements on [pylint](https://github.com/pylint-dev/pylint) to permit the latest version.
- [Release notes](https://github.com/pylint-dev/pylint/releases)
- [Commits](pylint-dev/pylint@pylint-2.0.dev...v4.0.5)

---
updated-dependencies:
- dependency-name: pylint
  dependency-version: 4.0.5
  dependency-type: direct:development
...

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

Author: dependabot[bot]

development.txt

@@ -1,3 +1,3 @@
 httpretty==1.0.*
-pylint==2.*
+pylint==4.*
 twine