[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/pyupgrade: v2.26.0 → v2.29.0](asottile/pyupgrade@v2.26.0...v2.29.0)
- [github.com/PyCQA/flake8: 3.9.2 → 4.0.1](PyCQA/flake8@3.9.2...4.0.1)
- [github.com/mgedmin/check-manifest: 0.46 → 0.47](mgedmin/check-manifest@0.46...0.47)

.pre-commit-config.yaml

@@ -3,7 +3,7 @@ ci:
 
 repos:
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.26.0
+    rev: v2.29.0
     hooks:
       - id: pyupgrade
         args: ["--py36-plus"]
@@ -15,7 +15,7 @@ repos:
         args: ["--target-version", "py36"]
 
   - repo: https://github.com/PyCQA/flake8
-    rev: 3.9.2
+    rev: 4.0.1
     hooks:
       - id: flake8
 
@@ -50,6 +50,6 @@ repos:
           - --remove-unused-variables
 
   - repo: https://github.com/mgedmin/check-manifest
-    rev: "0.46"
+    rev: "0.47"
     hooks:
       - id: check-manifest