Update latest branch to sync master

.github/sla.yml

@@ -0,0 +1,12 @@
+---
+- scheduleTask:
+    action: sendEmail
+    scope: issue
+    args:
+      booleanFilterExpression: "(triage)"
+      limit: 2d
+      subject: "Action Required: Please respond to ${URL}"
+      message: "<p> Dear SDK owner, <br> <br>Please response to issue ${URL} , the PR is waiting for response over 2 days. Thanks."
+      to: azure-go-sdk@microsoft.com
+    description: "send email to SDK owner for over 2 days issues labelled with triage"
+    name: "notification of SLA"

CHANGELOG.md

@@ -1,5 +1,60 @@
 # CHANGELOG
 
+## `v39.0.0`
+
+### New Packages
+
+| Package Name | API Version |
+| -----------: | :---------: |
+| appconfiguration | 2019-11-01-preview |
+| backup | 2019-06-15 |
+| containerregistry | 2019-08-15-preview |
+| containerservice | 2020-01-01 |
+| digitaltwins | 2020-03-01-preview |
+| documentdb | 2019-12-12 |
+| frontdoor | 2020-01-01 |
+| hybridcompute | 2019-12-12 |
+| kusto | 2019-11-09 |
+| netapp | 2019-11-01 |
+| network | 2019-11-01 |
+| support | 2019-05-01-preview |
+
+### Updated Packages
+
+| Package Name | API Version |
+| -----------: | :---------: |
+| blueprint | 2018-11-01-preview |
+| compute | 2019-07-01 |
+| containerservice | 2019-11-01 |
+| eventgrid | 2020-04-01-preview |
+| hdinsight | 2015-03-01-preview<br/>2018-06-01-preview |
+| healthcareapis | 2019-09-16 |
+| keyvault | 2018-02-14 |
+| operationalinsights | 2015-11-01-preview |
+| policy | 2019-09-01 |
+| qnamaker | v4.0 |
+| search | 2015-08-19 |
+| siterecovery | 2018-07-10 |
+| sql | 2017-03-01-preview<br/>2018-06-01-preview<br/>v3.0 |
+| web | 2019-08-01 |
+
+### BreakingChanges
+
+| Package Name | API Version |
+| -----------: | :---------: |
+| apimanagement | 2019-01-01 |
+| containerservice | 2017-07-01<br/>2017-08-31<br/>2017-09-30<br/>2018-03-31 |
+| insights | 2018-03-01<br/>2018-09-01<br/>2018-11-01-preview<br/>2019-03-01<br/>2019-06-01 |
+| machinelearningservices | 2018-11-19<br/>2019-05-01<br/>2019-06-01<br/>2019-11-01<br/>2020-01-01 |
+| managedapplications | 2019-07-01 |
+| mariadb | 2018-06-01 |
+| netapp | 2019-05-01<br/>2019-06-01<br/>2019-07-01<br/>2019-08-01<br/>2019-10-01 |
+| network | 2019-09-01 |
+| security | v1.0<br/>v2.0<br/>v3.0 |
+| securityinsight | 2017-08-01-preview |
+| siterecovery | 2018-01-10 |
+| storage | 2019-06-01 |
+
 ## `v38.2.0`
 
 ### New Packages

tools/major-updater/cmd/updateSDK.go

@@ -69,15 +69,15 @@ func theUpdateSDKCommand(sdk string) error {
 	majorVersion = currentMajorVersion + 1
 	printf("Next major version: %d\n", majorVersion)
 	vprintf("Checking out to latest branch in %s\n", cwd)
-	err = wt.Checkout(latest)
+	err = wt.Checkout(master)
 	if err != nil {
 		return fmt.Errorf("checkout failed: %v", err)
 	}
-	err = wt.Pull(upstream, latest)
+	err = wt.Pull(upstream, master)
 	if err != nil {
 		return fmt.Errorf("pull failed: %v", err)
 	}
-	vprintf("Checking out to new branch based on %s", latest)
+	vprintf("Checking out to new branch based on %s", master)
 	branchName := fmt.Sprintf(branchPattern, majorVersion)
 	err = createNewBranch(wt, branchName)
 	if err != nil {