feat(genai): bumping version and fixing tests

genai/package.json

@@ -13,7 +13,7 @@
     "test": "c8 mocha -p -j 2 --timeout 2400000 test/*.test.js test/**/*.test.js"
   },
   "dependencies": {
-    "@google/genai": "^0.13.0",
+    "@google/genai": "1.12.0",
     "axios": "^1.6.2",
     "supertest": "^7.0.0"
   },

genai/text-generation/textgen-with-txt-img.js

@@ -38,7 +38,7 @@ async function generateContent(
   };
 
   const response = await ai.models.generateContent({
-    model: 'gemini-2.5-flash',
+    model: 'gemini-2.0-flash',
     contents: [image, 'What is shown in this image?'],
   });
 

genai/tools/tools-code-exec-with-txt.js

@@ -31,7 +31,7 @@ async function generateContent(
   });
 
   const response = await ai.models.generateContent({
-    model: 'gemini-2.5-flash-preview-05-20',
+    model: 'gemini-2.0-flash',
     contents:
       'What is the sum of the first 50 prime numbers? Generate and run code for the calculation, and make sure you get all 50.',
     config: {