fix(deps): update module github.com/ibm/go-sdk-core/v5 to v5.15.3

Author: renovate[bot]

go.mod

@@ -3,12 +3,12 @@ module github.com/IBM/sql-query-go-sdk
 go 1.15
 
 require (
-	github.com/IBM/go-sdk-core/v5 v5.10.2
-	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d // indirect
-	github.com/fsnotify/fsnotify v1.5.1 // indirect
-	github.com/go-openapi/strfmt v0.21.3
-	github.com/mitchellh/mapstructure v1.4.3 // indirect
+	github.com/IBM/go-sdk-core/v5 v5.15.3
+	github.com/go-openapi/strfmt v0.22.0
+	github.com/kr/pretty v0.1.0 // indirect
 	github.com/onsi/ginkgo v1.16.5
-	github.com/onsi/gomega v1.19.0
-	github.com/stretchr/testify v1.8.0
+	github.com/onsi/gomega v1.27.6
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/stretchr/testify v1.8.4
+	github.com/tidwall/pretty v1.0.0 // indirect
 )