Update digitalocean module (#622)

Related #619

vendor/github.com/digitalocean/godo/godo.go

@@ -17,7 +17,7 @@ import (
 )
 
 const (
-	libraryVersion = "1.17.0"
+	libraryVersion = "1.30.0"
 	defaultBaseURL = "https://api.digitalocean.com/"
 	userAgent      = "godo/" + libraryVersion
 	mediaType      = "application/json"
@@ -45,6 +45,7 @@ type Client struct {
 	// Services used for communicating with the API
 	Account           AccountService
 	Actions           ActionsService
+	Balance           BalanceService
 	CDNs              CDNService
 	Domains           DomainsService
 	Droplets          DropletsService
@@ -65,6 +66,7 @@ type Client struct {
 	Firewalls         FirewallsService
 	Projects          ProjectsService
 	Kubernetes        KubernetesService
+	Registry          RegistryService
 	Databases         DatabasesService
 	VPCs              VPCsService
 
@@ -93,6 +95,9 @@ type Response struct {
 	// request body and not the header.
 	Links *Links
 
+	// Meta describes generic information about the response.
+	Meta *Meta
+
 	// Monitoring URI
 	Monitor string
 
@@ -161,6 +166,7 @@ func NewClient(httpClient *http.Client) *Client {
 	c := &Client{client: httpClient, BaseURL: baseURL, UserAgent: userAgent}
 	c.Account = &AccountServiceOp{client: c}
 	c.Actions = &ActionsServiceOp{client: c}
+	c.Balance = &BalanceServiceOp{client: c}
 	c.CDNs = &CDNServiceOp{client: c}
 	c.Certificates = &CertificatesServiceOp{client: c}
 	c.Domains = &DomainsServiceOp{client: c}
@@ -181,6 +187,7 @@ func NewClient(httpClient *http.Client) *Client {
 	c.StorageActions = &StorageActionsServiceOp{client: c}
 	c.Tags = &TagsServiceOp{client: c}
 	c.Kubernetes = &KubernetesServiceOp{client: c}
+	c.Registry = &RegistryServiceOp{client: c}
 	c.Databases = &DatabasesServiceOp{client: c}
 	c.VPCs = &VPCsServiceOp{client: c}
 
@@ -227,13 +234,11 @@ func SetUserAgent(ua string) ClientOpt {
 // BaseURL of the Client. Relative URLS should always be specified without a preceding slash. If specified, the
 // value pointed to by body is JSON encoded and included in as the request body.
 func (c *Client) NewRequest(ctx context.Context, method, urlStr string, body interface{}) (*http.Request, error) {
-	rel, err := url.Parse(urlStr)
+	u, err := c.BaseURL.Parse(urlStr)
 	if err != nil {
 		return nil, err
 	}
 
-	u := c.BaseURL.ResolveReference(rel)
-
 	buf := new(bytes.Buffer)
 	if body != nil {
 		err = json.NewEncoder(buf).Encode(body)