Add: saas.alerting.Xmatters

Adding xMatters node to alerting.

diagrams/saas/alerting.py

@@ -20,4 +20,8 @@ class Pushover(_Alerting):
     _icon = "pushover.png"
 
 
+class Xmatters(_Alerting):
+    _icon = "xmatters.png"
+
+
 # Aliases

docs/nodes/onprem.md

@@ -158,8 +158,8 @@ Node classes list of onprem provider.
 - **diagrams.onprem.monitoring.Dynatrace**
 - **diagrams.onprem.monitoring.Grafana**
 - **diagrams.onprem.monitoring.Humio**
-- **diagrams.onprem.monitoring.Newrelic**
 - **diagrams.onprem.monitoring.Nagios**
+- **diagrams.onprem.monitoring.Newrelic**
 - **diagrams.onprem.monitoring.PrometheusOperator**
 - **diagrams.onprem.monitoring.Prometheus**
 - **diagrams.onprem.monitoring.Sentry**

docs/nodes/saas.md

@@ -10,6 +10,7 @@ Node classes list of saas provider.
 - **diagrams.saas.alerting.Newrelic**
 - **diagrams.saas.alerting.Opsgenie**
 - **diagrams.saas.alerting.Pushover**
+- **diagrams.saas.alerting.Xmatters**
 
 ## saas.analytics