Add initial Microsoft Teams support

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

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

@@ -0,0 +1,41 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// ScheduleChangeState undocumented
+type ScheduleChangeState int
+
+const (
+	// ScheduleChangeStateVPending undocumented
+	ScheduleChangeStateVPending ScheduleChangeState = 0
+	// ScheduleChangeStateVApproved undocumented
+	ScheduleChangeStateVApproved ScheduleChangeState = 1
+	// ScheduleChangeStateVDeclined undocumented
+	ScheduleChangeStateVDeclined ScheduleChangeState = 2
+	// ScheduleChangeStateVUnknownFutureValue undocumented
+	ScheduleChangeStateVUnknownFutureValue ScheduleChangeState = 3
+)
+
+// ScheduleChangeStatePPending returns a pointer to ScheduleChangeStateVPending
+func ScheduleChangeStatePPending() *ScheduleChangeState {
+	v := ScheduleChangeStateVPending
+	return &v
+}
+
+// ScheduleChangeStatePApproved returns a pointer to ScheduleChangeStateVApproved
+func ScheduleChangeStatePApproved() *ScheduleChangeState {
+	v := ScheduleChangeStateVApproved
+	return &v
+}
+
+// ScheduleChangeStatePDeclined returns a pointer to ScheduleChangeStateVDeclined
+func ScheduleChangeStatePDeclined() *ScheduleChangeState {
+	v := ScheduleChangeStateVDeclined
+	return &v
+}
+
+// ScheduleChangeStatePUnknownFutureValue returns a pointer to ScheduleChangeStateVUnknownFutureValue
+func ScheduleChangeStatePUnknownFutureValue() *ScheduleChangeState {
+	v := ScheduleChangeStateVUnknownFutureValue
+	return &v
+}