Upgrade to Go 1.17. Set 1.16 as the minimal version

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v1
         with:
-          go-version: 1.16.x
+          go-version: 1.17.x
 
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2

.github/workflows/test.yml

@@ -5,7 +5,7 @@ jobs:
     name: Test
     strategy:
       matrix:
-        go-version: [1.15.x, 1.16.x]
+        go-version: [1.16.x, 1.17.x]
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{matrix.platform}}
     steps:

go.mod

@@ -14,4 +14,4 @@ require (
 	mvdan.cc/sh/v3 v3.3.1
 )
 
-go 1.15
+go 1.16