chore: update dependencies and configuration

- Added `.test-cache` to `.gitignore`.
- Created `package-lock.json` for dependency management.
- Updated `package.json` to require Node.js version 20 and updated various dependencies.
- Added `skipLibCheck` option in `tsconfig.json` and excluded test files from compilation.
- Removed `yarn.lock` files and replaced them with `package-lock.json` in examples.
- Minor code adjustments in `src` files for better type handling and formatting.

Author: akameco

.gitignore

@@ -2,3 +2,4 @@ node_modules
 lib
 dist
 .eslintcache
+.test-cache