Upgrade go 1.20 (#847)

Fixes #842

.github/workflows/coverage.yml

@@ -15,6 +15,6 @@ jobs:
       - name: Setup go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: 1.20
       - name: Run tests with coverage
         run: ./ci.sh coverage -d "${GITHUB_BASE_REF-HEAD}"

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: 1.20
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2
         with:

.github/workflows/workflow.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ 'ubuntu-latest', 'windows-latest', 'macos-latest']
-        go: [ '1.18', '1.19' ]
+        go: [ '1.19', '1.20' ]
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.go }}/${{ matrix.os }}
     steps:

fuzz_test.go

@@ -1,5 +1,5 @@
-//go:build go1.18 || go1.19
+//go:build go1.18 || go1.19 || go1.20
-// +build go1.18 go1.19
+// +build go1.18 go1.19 go1.20
 
 package toml_test