Install pip for pypy [skip appveyor] [skip travis]

Author: nicoddemus

azure-pipelines.yml

@@ -86,6 +86,15 @@ jobs:
     condition: eq(variables['python.exe'], 'pypy3')
     displayName: 'Install pypy3'
 
+  - task: PowerShell@2
+    inputs:
+      targetType: 'inline'
+      script: |
+        Invoke-WebRequest -Uri "https://bootstrap.pypa.io/get-pip.py" -OutFile "get-pip.py"
+        $(python.exe) get-pip.py
+    condition: startsWith(variables['python.exe'], 'pypy')
+    displayName: 'Install pip'
+
   - script: $(python.exe) -m pip install --upgrade pip && pip install tox
     displayName: 'Install tox'