Update .vsts-ci.yml

(cherry picked from commit 7238a1e8)

.vsts-ci.yml

@@ -5,11 +5,11 @@ trigger:
 - master
 - maint/*
 
-phases:
-- phase: linux_trusty_gcc_openssl
+jobs:
+- job: linux_trusty_gcc_openssl
   displayName: 'Linux (Trusty; GCC; OpenSSL)'
-  queue:
-    name: 'Hosted Linux Preview'
+  pool:
+    vmImage: 'Ubuntu 16.04'
   steps:
   - task: Docker@0
     displayName: Build
@@ -37,10 +37,10 @@ phases:
       containerCommand: '/src/ci/test.sh'
       detached: false
 
-- phase: linux_trusty_clang_openssl
+- job: linux_trusty_clang_openssl
   displayName: 'Linux (Trusty; Clang; OpenSSL)'
-  queue:
-    name: 'Hosted Linux Preview'
+  pool:
+    vmImage: 'Ubuntu 16.04'
   steps:
   - task: Docker@0
     displayName: Build
@@ -68,10 +68,10 @@ phases:
       containerCommand: '/src/ci/test.sh'
       detached: false
 
-- phase: macos
+- job: macos
   displayName: 'macOS'
-  queue:
-    name: 'Hosted macOS Preview'
+  pool:
+    vmImage: 'macOS 10.13'
   steps:
   - bash: . '$(Build.SourcesDirectory)/ci/setup-osx.sh'
     displayName: Setup
@@ -85,10 +85,9 @@ phases:
       TMPDIR: $(Agent.TempDirectory)
       LEAK_CHECK: leaks
 
-- phase: windows_vs_amd64
+- job: windows_vs_amd64
   displayName: 'Windows (Visual Studio; amd64)'
-  queue:
-    name: Hosted
+  pool: Hosted
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\build.ps1'
     displayName: Build
@@ -97,10 +96,9 @@ phases:
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
 
-- phase: windows_vs_x86
+- job: windows_vs_x86
   displayName: 'Windows (Visual Studio; x86)'
-  queue:
-    name: Hosted
+  pool: Hosted
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\build.ps1'
     displayName: Build
@@ -109,10 +107,9 @@ phases:
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
 
-- phase: windows_mingw_amd64
+- job: windows_mingw_amd64
   displayName: 'Windows (MinGW; amd64)'
-  queue:
-    name: Hosted
+  pool: Hosted
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\setup-mingw.ps1'
     displayName: Setup
@@ -127,10 +124,9 @@ phases:
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
 
-- phase: windows_mingw_x86
+- job: windows_mingw_x86
   displayName: 'Windows (MinGW; x86)'
-  queue:
-    name: Hosted
+  pool: Hosted
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\setup-mingw.ps1'
     displayName: Setup