[Outlook] Update minimum supported requirement sets (OfficeDev#952)

Author: samantharamon

playlists-prod/outlook.yaml

@@ -273,7 +273,7 @@
     https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/40-attachments/attachments-compose.yaml
   group: Attachments
   api_set:
-    Mailbox: '1.1'
+    Mailbox: '1.8'
 - id: outlook-attachments-get-attachment-content
   name: Get attachment content
   fileName: get-attachment-content.yaml
@@ -425,7 +425,7 @@
     https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/outlook/65-delegates-and-shared-folders/get-shared-properties.yaml
   group: Delegates And Shared Folders
   api_set:
-    Mailbox: '1.8'
+    Mailbox: '1.13'
 - id: outlook-mime-headers-get-internet-headers-message-read
   name: Get internet headers
   fileName: get-internet-headers-message-read.yaml

playlists/outlook.yaml

@@ -273,7 +273,7 @@
     https://raw.githubusercontent.com/OfficeDev/office-js-snippets/main/samples/outlook/40-attachments/attachments-compose.yaml
   group: Attachments
   api_set:
-    Mailbox: '1.1'
+    Mailbox: '1.8'
 - id: outlook-attachments-get-attachment-content
   name: Get attachment content
   fileName: get-attachment-content.yaml
@@ -425,7 +425,7 @@
     https://raw.githubusercontent.com/OfficeDev/office-js-snippets/main/samples/outlook/65-delegates-and-shared-folders/get-shared-properties.yaml
   group: Delegates And Shared Folders
   api_set:
-    Mailbox: '1.8'
+    Mailbox: '1.13'
 - id: outlook-mime-headers-get-internet-headers-message-read
   name: Get internet headers
   fileName: get-internet-headers-message-read.yaml

samples/outlook/40-attachments/attachments-compose.yaml

@@ -3,7 +3,7 @@ name: Manipulate attachments (Item Compose)
 description: 'Adds, gets, and removes attachments from a message or an appointment in Compose mode.'
 host: OUTLOOK
 api_set:
-    Mailbox: '1.1'
+    Mailbox: '1.8'
 script:
     content: |
         $("#add").on("click", add);

samples/outlook/65-delegates-and-shared-folders/get-shared-properties.yaml

@@ -3,7 +3,7 @@ name: Identify a shared folder or shared mailbox context
 description: Identifies whether the current mail item is in a shared folder or shared mailbox by getting its properties.
 host: OUTLOOK
 api_set:
-    Mailbox: '1.8'
+    Mailbox: '1.13'
 script:
     content: |
         $("#get").on("click", get);