Add more info about development process (#9)

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    registries: "*"
+    schedule:
+      interval: "weekly"
+    # Disable just version updates, keep only security updates.
+    open-pull-requests-limit: 0

README.md

@@ -5,6 +5,8 @@
 Python asynchronous and lightweight SQS client. The goal of this library is to provide fast and optimal access to SQS 
 for Python projects, e.g. when you need a high-load queue consumer or high-load queue producer written in Python.
 
+Supports Python versions 3.8, 3.9, 3.10, 3.11.
+
 ----
 
 ## Why aiosqs?
@@ -80,3 +82,13 @@ Close the client at the end:
 ```python
 await client.close()
 ```
+
+
+## Development
+
+Set up env and install dependencies:
+```shell
+python3 -m pip install poetry==1.5.0
+poetry env use 3.11
+poetry install
+```