Merge pull request flyteorg#61 from lyft/asottile-patch-3

Only install `configparser` backport in python 2.x

setup.py

@@ -7,6 +7,7 @@
 extras_require = LazyLoadPlugin.get_extras_require()
 
 extras_require[':python_version<"3"'] = [
+    "configparser>=3.0.0,<4.0.0",
     "futures>=3.2.0,<4.0.0",
     "pathlib2>=2.3.2,<3.0.0"
 ]
@@ -30,7 +31,6 @@
     install_requires=[
         "flyteidl>=0.15.0,<1.0.0",
         "click>=6.6,<8.0",
-        "configparser>=3.0.0,<4.0.0",
         "croniter>=0.3.20,<4.0.0",
         "deprecation>=2.0,<3.0",
         "boto3>=1.4.4,<2.0",