Update default branch to main, update pre-commit hooks

Author: homebysix

.pre-commit-config.yaml

@@ -1,24 +1,25 @@
 repos:
-- repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v3.2.0
-  hooks:
-  - id: check-added-large-files
-    args: [--maxkb=100]
-  - id: check-ast
-  - id: check-byte-order-marker
-  - id: check-case-conflict
-  - id: check-docstring-first
-  - id: check-merge-conflict
-  - id: mixed-line-ending
-  - id: no-commit-to-branch
-  - id: trailing-whitespace
-    args: [--markdown-linebreak-ext=md]
-- repo: https://github.com/ambv/black
-  rev: 20.8b1
-  hooks:
-  - id: black
-- repo: https://github.com/asottile/blacken-docs
-  rev: v1.8.0
-  hooks:
-  - id: blacken-docs
-    additional_dependencies: [black==20.8b1]
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+      - id: check-added-large-files
+        args: [--maxkb=100]
+      - id: check-ast
+      - id: check-byte-order-marker
+      - id: check-case-conflict
+      - id: check-docstring-first
+      - id: check-merge-conflict
+      - id: mixed-line-ending
+      - id: no-commit-to-branch
+        args: [--branch, main]
+      - id: trailing-whitespace
+        args: [--markdown-linebreak-ext=md]
+  - repo: https://github.com/ambv/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+  - repo: https://github.com/asottile/blacken-docs
+    rev: v1.9.2
+    hooks:
+      - id: blacken-docs
+        additional_dependencies: [black==20.8b1]