added build matric to azure pipeline [skip ci]

Author: JohnstonCode

build.yml

@@ -1,5 +1,13 @@
 jobs:
   - job: Windows
+    strategy:
+      matrix:
+        Code26:
+          CODE_VERSION: '1.26.0'
+        CodeCurrent:
+          CODE_VERSION: '*'
+        CodeInssiders:
+          CODE_VERSION: 'insiders'
     pool:
       name: Hosted VS2017
       demands: npm
@@ -21,6 +29,14 @@ jobs:
       - script: 'node node_modules/vscode/bin/test'
         displayName: 'Run tests'
   - job: macOS
+    strategy:
+      matrix:
+        Code26:
+          CODE_VERSION: '1.26.0'
+        CodeCurrent:
+          CODE_VERSION: '*'
+        CodeInssiders:
+          CODE_VERSION: 'insiders'
     pool:
       name: Hosted macOS
       demands: npm
@@ -42,6 +58,14 @@ jobs:
       - script: 'node node_modules/vscode/bin/test'
         displayName: 'Run tests'
   - job: Linux
+    strategy:
+      matrix:
+        Code26:
+          CODE_VERSION: '1.26.0'
+        CodeCurrent:
+          CODE_VERSION: '*'
+        CodeInssiders:
+          CODE_VERSION: 'insiders'
     pool:
       name: Hosted Ubuntu 1604
       demands: npm