Bug 1471622 - Update dependency specifier for mozfile in mozrunner; r=davehunt

Depends on D8096

Differential Revision: https://phabricator.services.mozilla.com/D8097

--HG--
extra : moz-landing-system : lando

testing/mozbase/mozrunner/setup.py

@@ -13,7 +13,7 @@ desc = """Reliable start/stop/configuration of Mozilla Applications (Firefox, Th
 
 deps = [
     'mozdevice>=1.*',
-    'mozfile==1.*',
+    'mozfile>=1.2',
     'mozinfo>=0.7,<2',
     'mozlog==3.*',
     'mozprocess>=0.23,<1',