Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// ItemActivityTimeSet undocumented
+type ItemActivityTimeSet struct {
+	// Object is the base model of ItemActivityTimeSet
+	Object
+	// LastRecordedDateTime undocumented
+	LastRecordedDateTime *time.Time `json:"lastRecordedDateTime,omitempty"`
+	// ObservedDateTime undocumented
+	ObservedDateTime *time.Time `json:"observedDateTime,omitempty"`
+	// RecordedDateTime undocumented
+	RecordedDateTime *time.Time `json:"recordedDateTime,omitempty"`
+}