Enable staticcheck Linter, replace golang.org/x/crypto/ssh/terminal, upgrade to SIF v2, merge 3.8.3 changelog / install.md changes to master, from sylabs 283, 296, 112, 305

[edytuk]

This pulls in sylabs PRs

• Enable staticcheck Linter sylabs/singularity#283
• Replace golang.org/x/crypto/ssh/terminal (master) sylabs/singularity#296
• Upgrade to SIF v2 (master) sylabs/singularity#112
• Merge 3.8.3 changelog / install.md changes to master sylabs/singularity#305
  which fixed
• Replace Deprecated Term Package sylabs/singularity#295
• Replace Deprecated UUID Package sylabs/singularity#3
• Replace Deprecated OpenPGP Package sylabs/singularity#275

The original PR descriptions were:

Enable staticcheck linter, and address associated lint.

Replace the deprecated golang.org/x/crypto/ssh/terminal package with golang.org/x/term.

Replace github.com/sylabs/sif module with github.com/sylabs/sif/v2. Replace deprecated golang.org/x/crypto/openpgp package within forked golang.org/x/crypto module (github.com/sylabs/golang-x-crypto) with github.com/ProtonMail/go-crypto/openpgp. Remove use of deprecated github.com/satori/go.uuid module.

Merge 3.8.3 changelog / install.md changes to master

[DrDaveD]

Rather than a merge, please do git rebase master and then do a force push with git push -f. That reduces the number of commits.