Update dependencies

Update go dependencies
Build with go 1.16
Fix typos and added docstrings

.gitignore

@@ -1,2 +1,3 @@
 alertmanager-webhook-fcm
 serviceAccountKey.json
+build/

.travis.yml

@@ -10,7 +10,7 @@ services:
 - docker
 matrix:
   include:
-  - go: 1.13.x
+  - go: 1.16.x
     env:
     - LATEST=true
   - go: tip

fcm.go

@@ -37,6 +37,7 @@ func init() {
 	tmplBody = tmpltext.Must(tmpltext.New("body").Option("missingkey=zero").Parse(bodyTemplate))
 }
 
+// TemplateError is returned if there was an error rendering a template
 type TemplateError struct {
 	Type string
 	Err  error
@@ -61,6 +62,7 @@ func NewMessaging() (*messaging.Client, error) {
 	return client, err
 }
 
+// NewDataMessage returns a new FCM data message
 func NewDataMessage(topic, title, body string) *messaging.Message {
 	unixMillisecondsUTC := time.Now().UTC().UnixNano() / 1000000
 	data := map[string]string{
@@ -78,8 +80,8 @@ func NewDataMessage(topic, title, body string) *messaging.Message {
 	}
 }
 
-// NewNoficationMessage returns a new FCM message including notificaton data
-func NewNoficationMessage(topic, title, body string) *messaging.Message {
+// NewNotificationMessage returns a new FCM message including notification data
+func NewNotificationMessage(topic, title, body string) *messaging.Message {
 	message := NewDataMessage(topic, title, body)
 	message.Notification = &messaging.Notification{
 		Title: title,
@@ -89,7 +91,7 @@ func NewNoficationMessage(topic, title, body string) *messaging.Message {
 	return message
 }
 
-// NewMessageFromAlertmanagerDats returns a new FCM data message from alertmanager POST data
+// NewMessageFromAlertmanagerData returns a new FCM data message from alertmanager POST data
 func NewMessageFromAlertmanagerData(topic string, m *template.Data) (*messaging.Message, error) {
 	title, err := tmpltextExecuteToString(tmplTitle, m)
 	if err != nil {

go.mod

@@ -3,11 +3,20 @@ module github.com/jayme-github/alertmanager-webhook-fcm
 go 1.14
 
 require (
-	cloud.google.com/go/firestore v1.2.0 // indirect
+	cloud.google.com/go v0.80.0 // indirect
+	cloud.google.com/go/firestore v1.5.0 // indirect
+	cloud.google.com/go/storage v1.14.0 // indirect
 	firebase.google.com/go v3.13.0+incompatible
+	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/julienschmidt/httprouter v1.3.1-0.20200114094804-8c9f31f047a3
-	github.com/prometheus/alertmanager v0.20.0
-	github.com/prometheus/client_golang v1.6.0
-	golang.org/x/net v0.0.0-20200602114024-627f9648deb9
-	google.golang.org/api v0.26.0 // indirect
+	github.com/prometheus/alertmanager v0.21.0
+	github.com/prometheus/client_golang v1.10.0
+	github.com/prometheus/common v0.20.0 // indirect
+	github.com/shurcooL/vfsgen v0.0.0-20200824052919-0d455de96546 // indirect
+	golang.org/x/mod v0.4.2 // indirect
+	golang.org/x/net v0.0.0-20210329181859-df645c7b52b1
+	golang.org/x/oauth2 v0.0.0-20210323180902-22b0adad7558 // indirect
+	golang.org/x/sys v0.0.0-20210326220804-49726bf1d181 // indirect
+	google.golang.org/api v0.43.0 // indirect
+	google.golang.org/genproto v0.0.0-20210329143202-679c6ae281ee // indirect
 )