all: Update Go to 1.21

Will make use of generics and other new features in separate commits.

Author: pg9182

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: ["windows-latest", "ubuntu-latest", "macOS-latest"]
-        go: ["1.19.x"]
+        go: ["1.21.x"]
       fail-fast: false
 
     steps:
@@ -52,4 +52,4 @@ jobs:
       run: go vet ./...
 
     - name: Go staticcheck
-      run: go run honnef.co/go/tools/cmd/staticcheck@2022.1.3 ./...
+      run: go run honnef.co/go/tools/cmd/staticcheck@2023.1.6 ./...

docs/PRODUCTION.md

@@ -6,7 +6,7 @@ This document describes the recommended setup for an non-containerized Atlas ser
 
 | Dependency | Version | Notes |
 | --- | --- | --- |
-| go | 1.19+ | |
+| go | 1.21.0+ | |
 | git | | for downloading code |
 | gcc | | other C compilers will work fine |
 | systemd | 250+ | 250 is needed for credentials to work <br/> 240 is needed for data directory stuff |

go.mod

@@ -1,6 +1,6 @@
 module github.com/r2northstar/atlas
 
-go 1.19
+go 1.21.0
 
 require (
 	github.com/VictoriaMetrics/metrics v1.23.1