earlier juliapkg has a bug when using equality specifier

Author: Christopher Doris

setup.cfg

@@ -15,9 +15,9 @@ zip_safe = False
 package_dir =
     =pysrc
 packages = juliacall
-python_requires = ~=3.5
+python_requires = ~=3.7
 install_requires =
-    juliapkg ~=0.1.0
+    juliapkg ~=0.1.8
 
 [options.package_data]
 juliacall =