golint: 20181026 -> 20201208

[tomberek]

bump and use Go modules to build

Motivation for this change

changes to golint rules

Things done

removed deps.nix

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[r-rmcgibbo]

Result of nixpkgs-review pr 114807 at dacd812 run on x86_64-linux 1

2 packages built:

• golint
• vimPlugins.vim-go

[fabaff]

Result of nixpkgs-review pr 114807 run on x86_64-linux 1

2 packages built:

• golint
• vimPlugins.vim-go

[fabaff]

• package built (see golint: 20181026 -> 20201208 #114807 (comment))
• all depending packages build
• tested on x86_64

...
ew/pr-114807]$ ./results/golint/bin/golint -h
Usage of ./results/golint/bin/golint:
        golint [flags] # runs on package in current directory
        golint [flags] [packages]
[...]

Update looks good to me.