Try python preview build on linux

dstansby · dstansby · commit 0fe70a54b081 · 2019-10-15T11:11:03.000+01:00
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
@@ -14,6 +14,8 @@ jobs:
         python.version: '3.6'
       Python37:
         python.version: '3.7'
+      PythonPreview:
+        python.version: 'Pre'
     maxParallel: 4
 
   steps:
diff --git a/ci/azure-pipelines-steps.yml b/ci/azure-pipelines-steps.yml
@@ -55,7 +55,8 @@ steps:
         texlive-latex-base \
         texlive-latex-extra \
         texlive-latex-recommended \
-        texlive-xetex texlive-luatex
+        texlive-xetex texlive-luatex \
+        zlib
     displayName: 'Install dependencies with apt'
 
 - script: |
