chore: upgrade to golang 1.20

Author: jsiebens

.github/workflows/build.yaml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: "1.20"
       - name: Build
         run: |
           go build cmd/brink/main.go

.github/workflows/ci.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: "1.20"
       - name: Tests
         run: |
           go test ./...

.github/workflows/nightly.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: "1.20"
       - name: Install cosign
         uses: sigstore/cosign-installer@v2.8.1
       - name: Run GoReleaser

.github/workflows/release.yaml

@@ -31,7 +31,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: "1.20"
       - name: Install cosign
         uses: sigstore/cosign-installer@v2.8.1
       - name: Run GoReleaser

.github/workflows/sample.yaml

@@ -1,6 +1,6 @@
 module github.com/jsiebens/brink
 
-go 1.19
+go 1.20
 
 require (
 	github.com/99designs/keyring v1.2.1