use the toml dict format

Pipfile

@@ -10,8 +10,6 @@ PyYAML = "*"
 MarkupSafe = "*"
 requests = ">=1.0.0"
 tornado = ">=4.2.1,<5.0"
-# Required by Tornado to handle threads stuff.
-futures = {version = ">=2.0", markers = "python_version < '3.0'"}
 pycrypto = ">=2.6.1"
 pyzmq = ">=2.2.0"
 
@@ -23,9 +21,20 @@ boto3 = ">=1.2.1"
 moto = ">=0.3.6"
 SaltPyLint = ">=v2017.3.6"
 pytest = ">=3.5.0"
-pytest-salt = {git = "git://github.com/saltstack/pytest-salt.git", ref = "master"}
+
+[packages.futures]
+# Required by Tornado to handle threads stuff.
+version = ">=2.0"
+markers = "python_version < '3.0'"
+
+[dev-packages.pytest-salt]
+git = "git://github.com/saltstack/pytest-salt.git"
+ref = "master"
+
+[dev-packages.httpretty]
 # httpretty Needs to be here for now even though it's a dependency of boto.
 # A pip install on a fresh system will decide to target httpretty 0.8.10 to
 # satisfy other requirements, and httpretty 0.8.10 has bugs in setup.py that
 # prevent it from being successfully installed (at least on Python 3.4).
-httpretty = {version = "*", markers = "python_version >= '3.4'"}
+version = "*"
+markers = "python_version >= '3.4'"