add-black (esphome#1593)

* Add black

Update pre commit

Update pre commit

add empty line

* Format with black

Author: glmnet

.pre-commit-config.yaml

@@ -1,11 +1,27 @@
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
--   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.4.0
+  - repo: https://github.com/ambv/black
+    rev: 20.8b1
     hooks:
-    -   id: trailing-whitespace
-    -   id: end-of-file-fixer
-    -   id: check-yaml
-    -   id: check-added-large-files
-    -   id: flake8
+    - id: black
+      args:
+        - --safe
+        - --quiet
+      files: ^((esphome|script|tests)/.+)?[^/]+\.py$
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.4
+    hooks:
+      - id: flake8
+        additional_dependencies:
+          - flake8-docstrings==1.5.0
+          - pydocstyle==5.1.1
+        files: ^(esphome|tests)/.+\.py$
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+      - id: no-commit-to-branch
+        args:
+          - --branch=dev
+          - --branch=master
+          - --branch=beta