update dependencies to resolve deprecations and security issues

- update @modelcontextprotocol/sdk 1.0.1 → 1.20.2
- update axios 1.6.2 → 1.13.1
- update dotenv 16.3.1 → 16.6.1
- update shx 0.3.4 → 0.4.0
- update typescript 5.6.2 → 5.9.3
- add vitest 4.0.5 for testing

resolves npm warnings for deprecated [email protected] and [email protected]
fixes 5 moderate severity vulnerabilities in vitest dependency chain

Author: 27Bslash6