[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 21.5b2 → 21.6b0](psf/black@21.5b2...21.6b0)
- [github.com/pre-commit/mirrors-mypy: v0.812 → v0.902](pre-commit/mirrors-mypy@v0.812...v0.902)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -1,7 +1,7 @@
 exclude: '^($|.*\.bin)'
 repos:
   - repo: https://github.com/psf/black
-    rev: 21.5b2
+    rev: 21.6b0
     hooks:
       - id: black
         args: [--safe, --quiet]
@@ -24,7 +24,7 @@ repos:
     - id: reorder-python-imports
       args: ['--application-directories=.:src']
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.812  # NOTE: keep this in sync with tox.ini
+    rev: v0.902  # NOTE: keep this in sync with tox.ini
     hooks:
       - id: mypy
         files: ^(src|tests)