gha: add go1.19, drop go1.16

Both go1.16 and go1.17 reached EOL, but keeping go1.17 for now, for
projects that haven't updated yet.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.github/workflows/validate.yml

@@ -33,7 +33,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.18.x
+          go-version: 1.19.x
       - uses: golangci/golangci-lint-action@v3
         with:
           version: v1.49
@@ -50,7 +50,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go-version: [1.16.x, 1.17.x, 1.18.x]
+        go-version: [1.17.x, 1.18.x, 1.19.x]
         race: ["-race", ""]
     runs-on: ubuntu-20.04
     steps:

go.mod

@@ -1,5 +1,5 @@
 module github.com/opencontainers/selinux
 
-go 1.13
+go 1.17
 
 require golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8

vendor/modules.txt

@@ -1,3 +1,4 @@
 # golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8
+## explicit; go 1.17
 golang.org/x/sys/internal/unsafeheader
 golang.org/x/sys/unix