CI: Bump go version, linters and fix minor issues (#1130)

* CI: Bump go version, linters and fix minor issues

* Bump version, fix loop variables

* Revert

* Rid TODOs now that 1.51 has been released

.github/workflows/linter.yml

@@ -8,8 +8,8 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v3
         with:
-          go-version: '1.19.x'
+          go-version: '1.20.x'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.48.0
+          version: v1.51.0

.github/workflows/proto-lint.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19.x
+          go-version: 1.20.x
 
       - name: Setup build depends
         run: |

.github/workflows/tests.yml

@@ -1,7 +1,7 @@
 on: [push, pull_request]
 name: CI
 env:
-  GO_VERSION: 1.19.x
+  GO_VERSION: 1.20.x
 jobs:
   backend-psql:
     name: GoCryptoTrader back-end with PSQL