Upgrade go to 1.20 to reflect latest packer-plugins-sdk go version and unblock gomod upgrades

Signed-off-by: Dom Del Nano <ddelnano@gmail.com>

.github/workflows/go-test.yml

@@ -19,6 +19,6 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: "1.20"
       - name: Run go tests
         run: go test -race -count 1 ./... -timeout=3m

.github/workflows/release.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: "1.20"
       - name: Describe plugin
         id: plugin_describe
         run: echo "::set-output name=api_version::$(go run . describe | jq -r '.api_version')"

.go-version

@@ -0,0 +1 @@
+1.20.11

README.md

@@ -45,7 +45,7 @@ If you are using an older version of packer or are still using json templates yo
 ### Dependencies
 * Packer >= v1.7.1 (https://packer.io)
 * XenServer / Citrix Hypervisor > 7.6
-* Golang 1.17
+* Golang 1.20
 
 ## Compile the plugin
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/xenserver/packer-builder-xenserver
 
-go 1.17
+go 1.20
 
 require (
 	github.com/amfranz/go-xmlrpc-client v0.0.0-20190612172737-76858463955d