Add staticcheck to Go pre-commit hooks

[The Go's `lint` tool got deprecated](https://github.com/golang/lint) some time
ago. It can be replaced by the `staticcheck` tool, which offers similar
functionalities.
In the `keep-network/keep-core` project we've previously added a GH Action job
that runs the `staticcheck` tool as part of the CI. We want now to also add it
to the Go pre-commit hooks, so that developers could be informed about the
problems in their code before they push it to the remote repository.
In a separate PR we've adding a new custom hook to the
`keep-network/pre-commit-golang` repository. In this PR we're changing the
config to use that new custom hook. We're also removing deprecated `lint` hook
from the config.
Apart from modifyng the `.pre-commit-config.yaml` we're also updating the
`macos-setup.sh` script - so that it would be in line with the modified config.

To adjust the pre-commit hooks on local machine to the new configuration users
should:
1. Install the `staticcheck` tool:
```
go install honnef.co/go/tools/cmd/staticcheck@latest
```
2. Apply the pre-commit hooks config:
```
pre-commit install --install-hooks
```

.pre-commit-config.yaml

@@ -1,10 +1,11 @@
 repos:
  - repo: https://github.com/keep-network/pre-commit-golang.git
-   rev: 4cc73f21101f9da1208719b02bbbe0a4c491497e
+   rev: 979f199 # update after merging https://github.com/keep-network/pre-commit-golang/pull/5 
    hooks:
     - id: go-imports
     - id: go-vet
     - id: go-fmt
+    - id: staticcheck
  - repo: https://github.com/keep-network/pre-commit-hooks.git
    rev: 63e729f
    hooks:

scripts/macos-setup.sh

@@ -20,7 +20,7 @@ go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
 echo "Installing precommit requirements..."
 brew list pre-commit &>/dev/null || brew install pre-commit
 go install golang.org/x/tools/cmd/goimports@latest
-go install golang.org/x/lint/golint@latest
+go install honnef.co/go/tools/cmd/staticcheck@latest
 
 echo "Installing jq..."
 brew list jq &>/dev/null || brew install jq