Unpin requirements, since this is a CLI tool. Also reorder them.
Unpin requirements, since this is a CLI tool. Also reorder them.

CLI tools must be installed globally, so the requirements should be relaxed
in case there are other globally installed tools.

joeyespo/grip,mgoddard-pivotal/grip,ssundarraj/grip,jbarreras/grip,mgoddard-pivotal/grip,ssundarraj/grip,jbarreras/grip,joeyespo/grip