Add pre-commit (#28)

Author: anand2312

.pre-commit-config.yaml

@@ -0,0 +1,37 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.0.1
+    hooks:
+      - id: trailing-whitespace
+      - id: check-added-large-files
+      - id: end-of-file-fixer
+      - id: mixed-line-ending
+        args: ["--fix=lf"]
+
+  - repo: https://github.com/pre-commit/mirrors-isort
+    rev: v5.8.0
+    hooks:
+      - id: isort
+        args:
+          [
+            "--multi-line=3",
+            "--trailing-comma",
+            "--force-grid-wrap=0",
+            "--use-parentheses",
+            "--line-width=88",
+          ]
+
+  - repo: https://github.com/humitos/mirrors-autoflake.git
+    rev: v1.1
+    hooks:
+      - id: autoflake
+        args: ["--in-place", "--remove-all-unused-imports"]
+
+  - repo: https://github.com/psf/black
+    rev: 21.9b0
+    hooks:
+      - id: black
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v2.4.1
+    hooks:
+      - id: prettier

README.md

@@ -91,6 +91,7 @@ await client.from_("countries").eq("name", "Việt Nam").delete().execute()
 $ git clone https://github.com/supabase/postgrest-py.git
 $ cd postgrest-py
 $ poetry install
+$ poetry run pre-commit install
 ```
 
 ### Testing