require a fixed version of PythonCall

Christopher Doris · Christopher Doris · commit bb5ff0e6489a · 2022-08-03T20:00:57.000+01:00
diff --git a/pysrc/juliacall/juliapkg.json b/pysrc/juliacall/juliapkg.json
@@ -3,7 +3,7 @@
     "packages": {
         "PythonCall": {
             "uuid": "6099a3de-0909-46bc-b1f4-468b9a2dfc0d",
-            "version": "0.9.4"
+            "version": "=0.9.4"
         }
     }
 }
