Bump executing from 0.8.3 to 2.1.0

Bumps [executing](https://github.com/alexmojaki/executing) from 0.8.3 to 2.1.0.
- [Release notes](https://github.com/alexmojaki/executing/releases)
- [Commits](alexmojaki/executing@v0.8.3...v2.1.0)

---
updated-dependencies:
- dependency-name: executing
  dependency-type: indirect
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -80,7 +80,7 @@ djangorestframework==3.14.0
     #   django-rest-swagger
 dodgy==0.2.1
     # via prospector
-executing==0.8.3
+executing==2.1.0
     # via stack-data
 filelock==3.8.0
     # via
@@ -253,7 +253,13 @@ tinycss2==1.1.1
 toml==0.10.2
     # via prospector
 tomli==2.0.1
-    # via pytest
+    # via
+    #   black
+    #   coverage
+    #   mypy
+    #   pylint
+    #   pytest
+    #   tox
 tomlkit==0.11.6
     # via pylint
 tox==3.27.1