chore(deps): update module go to 1.20 (#69)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

test/go.mod

@@ -1,11 +1,8 @@
 module integration
 
-go 1.19
+go 1.20
 
-require (
-	github.com/GoogleCloudPlatform/cloud-foundation-toolkit/infra/blueprint-test v0.6.0
-	github.com/stretchr/testify v1.8.4
-)
+require github.com/GoogleCloudPlatform/cloud-foundation-toolkit/infra/blueprint-test v0.6.0
 
 require (
 	cloud.google.com/go v0.110.2 // indirect
@@ -50,6 +47,7 @@ require (
 	github.com/mitchellh/go-testing-interface v1.14.2-0.20210217184823-a52172cd2f64 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
 	github.com/tidwall/gjson v1.14.4 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect