Update old Gemini versions + remove mesop version pin

main.py

@@ -264,12 +264,12 @@ def main():
           label="Model",
           options=[
             me.SelectOption(
-              label="gemini-1.5-flash",
-              value="gemini-1.5-flash",
+              label="gemini-flash-latest",
+              value="gemini-flash-latest",
             ),
             me.SelectOption(
-              label="gemini-1.5-pro",
-              value="gemini-1.5-pro",
+              label="gemini-flash-lite-latest",
+              value="gemini-flash-lite-latest",
             ),
           ],
           key="model",

requirements.txt

@@ -1,4 +1,4 @@
-mesop==0.14.1
+mesop
 requests
 google-generativeai
 gunicorn

state.py

@@ -14,7 +14,7 @@ class State:
 
   # Settings
   api_key: str = os.getenv("GEMINI_API_KEY", "")
-  model: str = "gemini-1.5-flash"
+  model: str = "gemini-flash-latest"
   runner_url: str = os.getenv("MESOP_APP_MAKER_RUNNER_URL", c.DEFAULT_URL)
   runner_token: str = os.getenv("MESOP_APP_MAKER_RUNNER_TOKEN", "")