Bump to go 1.19

Author: Callisto13

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2
         with:
-          go-version: '1.17'
+          go-version: '1.19'
       - name: Build
         run: make build
       - name: Test

go.mod

@@ -1,6 +1,6 @@
 module github.com/weaveworks-liquidmetal/cluster-api-provider-microvm
 
-go 1.17
+go 1.19
 
 // This is required because the cluster-api/test package imports an invalid
 // cluster-api version. Basically whenever you bump cluster-api and