Update Go to 1.21

Signed-off-by: Carlisle Huson <[email protected]>

.github/workflows/ci.yaml

@@ -14,7 +14,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.18'
+        go-version: '1.21'
     - name: goimports
       run: go get golang.org/x/tools/cmd/goimports && goimports -d . | (! grep .)
     # Workaround for missing checksums caused by https://github.com/golang/go/issues/44129
@@ -40,7 +40,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.18'
+        go-version: '1.21'
     - name: Set up Docker Buildx
       id: buildx
       uses: docker/setup-buildx-action@v1

.golangci.yml

@@ -78,10 +78,10 @@ linters-settings:
       - name: waitgroup-by-value
 
   staticcheck:
-    go: "1.18"
+    go: "1.21"
 
   unused:
-    go: "1.18"
+    go: "1.21"
 
 output:
   sort-results: true

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine as builder
+FROM golang:1.21-alpine as builder
 RUN apk add --update make
 ADD ./ /src
 WORKDIR /src

go.mod

@@ -1,6 +1,6 @@
 module github.com/packethost/cacher
 
-go 1.18
+go 1.21
 
 require (
 	github.com/equinix-labs/otel-init-go v0.0.9