fix: Update Required Python Version to 3.13 in all tutorials (#47)

Author: holtskinner

.ruff.toml

@@ -9,7 +9,7 @@
 line-length = 80 # Google Style Guide §3.2: 80 columns
 indent-width = 4 # Google Style Guide §3.4: 4 spaces
 
-target-version = "py310" # Minimum Python version
+target-version = "py313" # Minimum Python version
 
 [lint]
 ignore = [

examples/google_adk/birthday_planner/README.md

@@ -6,7 +6,7 @@ This agent helps plan birthday parties. It has access to a Calendar Agent that i
 
 ## Prerequisites
 
-- Python 3.9 or higher
+- Python 3.13 or higher
 - [UV](https://docs.astral.sh/uv/)
 - A Gemini API Key
 

examples/google_adk/calendar_agent/README.md

@@ -4,7 +4,7 @@ This example shows how to create an A2A Server that uses an ADK-based Agent that
 
 ## Prerequisites
 
-- Python 3.9 or higher
+- Python 3.13 or higher
 - [UV](https://docs.astral.sh/uv/)
 - A Gemini API Key
 - A [Google OAuth Client](https://developers.google.com/identity/openid-connect/openid-connect#getcredentials)