Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/VpnRouteModel.go

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// VpnRoute undocumented
+type VpnRoute struct {
+	// Object is the base model of VpnRoute
+	Object
+	// DestinationPrefix Destination prefix (IPv4/v6 address).
+	DestinationPrefix *string `json:"destinationPrefix,omitempty"`
+	// PrefixSize Prefix size. (1-32). Valid values 1 to 32
+	PrefixSize *int `json:"prefixSize,omitempty"`
+}