Add initial Microsoft Teams support

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

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

@@ -0,0 +1,15 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// OpeningHoursSpecification undocumented
+type OpeningHoursSpecification struct {
+	// Object is the base model of OpeningHoursSpecification
+	Object
+	// DayOfWeek undocumented
+	DayOfWeek *string `json:"dayOfWeek,omitempty"`
+	// Opens undocumented
+	Opens *string `json:"opens,omitempty"`
+	// Closes undocumented
+	Closes *string `json:"closes,omitempty"`
+}