Update CI version number

azure-pipelines.yml

@@ -8,7 +8,7 @@ pr:
   - develop
 
 variables:
-  BASE_VERSION: 1.7.1
+  BASE_VERSION: 1.8.0
   PREVIEW_LABEL: 'ci'
   BUILD_NUMBER: $[counter(format('{0}_{1}_{2}', variables['BASE_VERSION'], variables['PREVIEW_LABEL'], variables['Build.SourceBranch']), 1)]
   NUGET_VERSION: $[format('{0}-{1}.{2}', variables['BASE_VERSION'], variables['PREVIEW_LABEL'], variables['BUILD_NUMBER'])]