Updated dependencies and release binaries for FreeBSD and OpenBSD

Update secrets dependency for sorting secrets properly

• Bump secrets dependency
  • vault aliases are now case-insensitive
  • vault files are locked when writing to disallow accidental parallel writes

• Use secrets as a dependency;
• Remove support for scrypt;
• Update Go crypto packages.

• Support only configuration in XDG base directory;
• Start using Go modules.

• Using Argon2id for secret key instead of scrypt;
• Updated all cryptography-related dependencies;
• Configuration location follows XDG Base Directory (https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html) standard;

• Increase scrypt work factors.

• Add support for multiple vaults with aliases. When upgrading from previous version, then ~/.secrets.conf needs to be deleted and vault needs to be re-initialized.

• Command-line options, which were actually commands, are now proper commands.

• Initial release