DebugConfigurationProvider API was intro'd in 1.16.0

https://code.visualstudio.com/updates/v1_16#_debug-api-updates

Author: rkeithhill

package.json

@@ -5,7 +5,7 @@
   "publisher": "ms-vscode",
   "description": "Develop PowerShell scripts in Visual Studio Code!",
   "engines": {
-    "vscode": "^1.17.0"
+    "vscode": "^1.16.0"
   },
   "license": "SEE LICENSE IN LICENSE.txt",
   "homepage": "https://github.com/PowerShell/vscode-powershell/blob/master/README.md",