[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/PyCQA/prospector: 1.3.1 → 1.5.1b0](prospector-dev/prospector@1.3.1...1.5.1b0)
- [github.com/psf/black: 21.7b0 → 21.8b0](psf/black@21.7b0...21.8b0)

.pre-commit-config.yaml

@@ -14,13 +14,13 @@ repos:
       - id: debug-statements
       - id: check-merge-conflict
   - repo: https://github.com/PyCQA/prospector
-    rev: 1.3.1
+    rev: 1.5.1b0
     hooks:
       - id: prospector
         # Exciting bash to support running inside docker or a local virtual env.
         entry: bash -c "poetry shell; python -m prospector -X . ;"
   - repo: https://github.com/psf/black
-    rev: 21.7b0
+    rev: 21.8b0
     hooks:
       - id: black
   - repo: https://github.com/PyCQA/isort