feat(node): add saas.alerting.Pushover (#241)

diagrams/saas/alerting.py

@@ -12,4 +12,8 @@ class Opsgenie(_Alerting):
     _icon = "opsgenie.png"
 
 
+class Pushover(_Alerting):
+    _icon = "pushover.png"
+
+
 # Aliases

docs/nodes/saas.md

@@ -8,6 +8,7 @@ Node classes list of saas provider.
 ## saas.alerting
 
 - **diagrams.saas.alerting.Opsgenie**
+- **diagrams.saas.alerting.Pushover**
 
 ## saas.analytics