Adjust coverage thresholds to 40% with 100% function coverage

- Set branches, lines, statements to 40%
- Keep functions at 100% to ensure every function is tested
- More practical for educational purposes while ensuring core functionality is covered

Author: Dias, Diego

jest.config.jest-tests.js

@@ -13,10 +13,10 @@ module.exports = {
   coverageReporters: ["text", "lcov", "json-summary"],
   coverageThreshold: {
     global: {
-      branches: 100,
-      functions: 100,
-      lines: 100,
-      statements: 100,
+      branches: 40,
+      functions: 100,  // Every function must be tested
+      lines: 40,
+      statements: 40,
     },
   },
 };