Update cirrus and version of golang

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

.cirrus.yml

@@ -27,8 +27,8 @@ env:
     ####
     # GCE project where images live
     IMAGE_PROJECT: "libpod-218412"
-    FEDORA_NAME: "fedora-38"
-    PRIOR_FEDORA_NAME: "fedora-37"
+    FEDORA_NAME: "fedora-39β"
+    PRIOR_FEDORA_NAME: "fedora-38"
     DEBIAN_NAME: "debian-13"
 
     # Image identifiers
@@ -120,7 +120,7 @@ vendor_task:
 
     # Runs within Cirrus's "community cluster"
     container:
-        image: docker.io/library/golang:1.18
+        image: docker.io/library/golang:1.21
         cpu: 1
         memory: 1
 

Makefile

@@ -198,7 +198,7 @@ test-unit: tests/testreport/testreport
 	$(GO_TEST) -v -tags "$(STORAGETAGS) $(SECURITYTAGS)" -cover $(RACEFLAGS) ./cmd/buildah -args --root $$tmp/root --runroot $$tmp/runroot --storage-driver vfs --signature-policy $(shell pwd)/tests/policy.json --registries-conf $(shell pwd)/tests/registries.conf
 
 vendor-in-container:
-	podman run --privileged --rm --env HOME=/root -v `pwd`:/src -w /src docker.io/library/golang:1.18 make vendor
+	podman run --privileged --rm --env HOME=/root -v `pwd`:/src -w /src docker.io/library/golang:1.21 make vendor
 
 .PHONY: vendor
 vendor:

go.mod

@@ -1,6 +1,6 @@
 module github.com/containers/buildah
 
-go 1.18
+go 1.21
 
 require (
 	github.com/containerd/containerd v1.7.8