chore: bump up go version to 1.21

.github/workflows/build_dev.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.18.3'
+          go-version: '1.21'
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:

.github/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v2
         with:
-          go-version: '1.18'
+          go-version: '1.21'
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.18.3'
+          go-version: '1.21'
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:

.github/workflows/test.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.18'
+          go-version: '1.21'
       - name: install dependencies
         run: go mod tidy
       - name: test binaries
@@ -74,7 +74,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.18'
+          go-version: '1.21'
       - name: install dependencies
         run: go mod tidy
       - name: install spicedb binary

Dockerfile.dev

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine3.15 as builder
+FROM golang:1.21-alpine3.19 as builder
 
 RUN apk add make
 
@@ -11,7 +11,7 @@ COPY . .
 
 RUN make build
 
-FROM alpine:3.16
+FROM alpine:3.19
 COPY --from=builder /go/src/app/shield /usr/bin/
 RUN apk update
 RUN apk add ca-certificates

docs/docs/installation.md

@@ -51,7 +51,7 @@ $ docker run -p 8080:8080 \
 
 Shield requires the following dependencies:
 
-- Golang (version 1.18 or above)
+- Golang (version 1.21 or above)
 - Git
 
 ### Build

go.mod

@@ -1,6 +1,6 @@
 module github.com/goto/shield
 
-go 1.18
+go 1.21
 
 require (
 	contrib.go.opencensus.io/exporter/prometheus v0.4.2