Update azure-pipelines.yml for Azure Pipelines

Author: garypretty

azure-pipelines.yml

@@ -22,12 +22,7 @@ steps:
 - script: |
  python -m pip install --upgrade pip
  pip install pytest pytest-azurepipelines
- pip install aiounittest
- pip install botbuilder
- pip install asyncio
- pip install botbuilder.dialogs
- pip install botbuilder.core.adapters
- pip install botbuilder.schema
+ pip install -e .\libraries\botbuilder-community-dialogs-prompts\
  displayName: 'Install dependencies'
 
 - script: |