Fix Security Vulerabilities by Upgrading Crypto To Version 0.21.0

[b01]

Problem

Any application that depends on this library will indirectly require golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d // indirect

Currently mongo uses this library in its Go driver. Which my library uses. Resulting in security warnings.

Proposal

Bumping golang.org/x/crypto to at least version 0.21.0 will patch:

• CVE-2023-48795 5.9 Insufficient Verification of Data Authenticity vulnerability with Medium severity found
• CVE-2023-42818 9.8 Improper Restriction of Excessive Authentication Attempts vulnerability with High severity found