Bump Go to 1.15 (#2974)

Signed-off-by: Gábor Lipták <gliptak@gmail.com>

.github/workflows/push.yml

@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.14
+        go-version: 1.15
       id: go
 
     - name: Check out code into the Go module directory

Dockerfile

@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-FROM --platform=$BUILDPLATFORM golang:1.14 as builder-env
+FROM --platform=$BUILDPLATFORM golang:1.15 as builder-env
 
 ARG GOPROXY
 ARG PKG

changelogs/unreleased/2974-gliptak

@@ -0,0 +1 @@
+Compile with Go 1.15

go.mod

@@ -1,6 +1,6 @@
 module github.com/vmware-tanzu/velero
 
-go 1.14
+go 1.15
 
 require (
 	cloud.google.com/go v0.46.2 // indirect

hack/build-image/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.14
+FROM golang:1.15
 
 ARG GOPROXY